A binder composition, an electrode, and methods thereof

Abstract

The present disclosure provides a binder composition comprising: a fibrillating binder; and a non-fibrillating binder of Formula (I): [(CH2-CH(R1))-(R2)]n, wherein R1 is selected from H or C1-4 alkyl; and R2 is selected from C4-8 alpha-olefins or vinyl acetate. The present disclosure also provides an electrode composite comprising a. an active material; b. at least one conductive carbon; and the binder composition as disclosed herein. The present disclosure further relates to a process for preparing the electrode composite.

Description

A BINDER COMPOSITION, AN ELECTRODE, AND METHODS THEREOFFIELD OF INVENTION

[0001] The present disclosure broadly relates to the field of battery. Particularly, the present disclosure relates to a binder composition, an electrode prepared using an electrode composite comprising the binder composition.BACKGROUND OF INVENTION

[0002] PTFE (polytetrafluroethylene) and PVDF (polyvinylidenefluoride) is a commonly used binder combination in dry electrode preparation process. PTFE is used as the main binder in the dry electrode process owing to its good fibrillation properties. However, it is highly reactive at the anode side. PTFE reacts at the anode at lower potentials to form carbyne (amorphous carbon) and Lithium Fluoride which affects the first cycle efficiency, and capacity as well as life cycle of the cell. This instability is attributed to the lower LUMO (Lowest Unoccupied Molecular Orbitals) of PTFE and the presence of fluorine atoms. Further, the PTFE reduction in the anode degrades the adhesion with the current collector and leads to the delamination of the film. On the other hand, issues with PVDF based binder are: higher processing temperature, capacity fading, and toxicity due to fluorine. In addition, when PVDF is used in electrodes, cracks are observed on the electrode surface, which would damage conduction between active particles and carbon black or aluminium foil current collector, thus leading to capacity fading as well as cycle life shortening. Moreover, fluorinated binder possesses lower surface energy than other types of binders. Use of two fluorinated binders in the system has a reduced adhesiveness compared to the non-fluorinated binders. Therefore, there is a need to address the issue caused by the binder system without compromising their role in dry electrode preparation.SUMMARY OF THE INVENTION

[0003] In a first aspect of the present disclosure, there is provided a binder composition comprising:a. a fibrillating binder; and b. a non-fibrillating binder of Formula (I) f(CH2-CH(Ri))-(R2)^i Formula (I) wherein Ri is selected from H or Ci-4 alkyl; and R2is selected from C4-8 alphaolefins or vinyl acetate.

[0004] In a second aspect of the present disclosure, there is provided an electrode composite comprising: a. an active material in a weight range of 96 to 98% with respect to total weight of the composite; b. at least one conductive carbon in a weight range of 0.3 to 1.5% with respect to total weight of the composite; c. the binder composition as disclosed herein; wherein the binder composition comprises the fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the composite, and the non-fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the composite.

[0005] In a third aspect of the present disclosure, there is provided a process of preparation of the electrode composite as disclosed herein, the process comprising: a. mixing an active material with at least one conductive carbon to obtain a first mixture; b. blending a non-fibrillating binder with a fibrillating binder to obtain a binder composition; c. mixing the first mixture with the binder composition to obtain a second mixture; d. high shear mixing the second mixture to obtain a third mixture; and e. jet milling the third mixture to obtain the electrode composite.

[0006] In a fourth aspect of the present disclosure, there is provided an electrode comprising the electrode composite as disclosed herein.

[0007] In a fifth aspect of the present disclosure, there is provided an electrochemical cell comprising: a. an anode comprising the electrode composite as disclosed herein; b. a cathode; c. an electrolyte; and a separator.

[0008] These and other features, aspects, and advantages of the present subject matter will be better understood with reference to the following description. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES

[0009] In order that the disclosure may be readily understood and put into practical effect, reference will now be made to exemplary embodiments as illustrated with reference to the accompanying figures. The figures together with a detailed description below, are incorporated in and form part of the specification, and serve to further illustrate the embodiments and explain various principles and advantages, in accordance with the present disclosure wherein:

[0010] Figure 1 depicts physical images of a) PTFE+PVDF and b) PTFE+EO (polyethylene octene), in accordance with an embodiment of the present disclosure.

[0011] Figure 2 depicts SEM (scanning electron microscopy) images of electrode fabricated with the binder composition a) PTFE+PVDF and b) PTFE+EO, in accordance with an embodiment of the present disclosure.

[0012] Figure 3 depicts charge discharge curve of the electrodes fabricated with PTFE+PVDF binder composition and PTFE+EO binder composition, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION OF THE INVENTION

[0013] Those skilled in the art will be aware that the present disclosure is subject to variations and modifications other than those specifically described. It is to be understood that the present disclosure includes all such variations and modifications. The disclosure also includes all such steps, features, compositions, and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any or more of such steps or features. Definitions

[0014] For convenience, before further description of the present disclosure, certain terms employed in the specification, and examples are delineated here. These definitions should be read in the light of the remainder of the disclosure and understood as by a person of skill in the art. The terms used herein have the meanings recognized and known to those of skill in the art, however, for convenience and completeness, particular terms and their meanings are set forth below.

[0015] The articles “a”, “an” and “the” are used to refer to one or to more than one (i.e., to at least one) of the grammatical object of the article.

[0016] The terms “comprise” and “comprising” are used in the inclusive, open sense, meaning that additional elements may be included. It is not intended to be construed as “consists of only”.

[0017] Throughout this specification, unless the context requires otherwise the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated element or step or group of element or steps but not the exclusion of any other element or step or group of element or steps.

[0018] The term “including” is used to mean “including but not limited to”. “Including” and “including but not limited to” are used interchangeably.

[0019] The term “w / w” means the percentage by weight, relative to the weight of the total composition, unless otherwise specified.

[0020] The term "at least one" is used to mean one or more and thus includes individual components as well as mixtures / combinations.

[0021] The term “active material” refers to the active constituent of an electrode, which comprises the particles that undergo oxidation or reduction, resulting in reversible ion storage. Examples of active material in the present disclosure includes but not limited to natural graphite, synthetic graphite, silicon, siliconcarbon composites, layered oxide cathode materials such as lithium nickel manganese cobalt oxide (NMC), lithium rich metal oxides (LMR), or lithium nickel manganese oxide (LNMO), olivine materials such as lithium iron phosphate (LFP), and lithium iron manganese phosphate (LMFP).

[0022] The term “conductive carbon” refers to an electrically conductive allotrope of carbon that provide channel for electronic movement, resulting in higher discharge capacity and better cycling performance. Examples of conductive carbon include but are not limited to super P, carbon nanotubes, graphite, graphene, ketjen black, carbon black, or carbon fibers.

[0023] The term “binder” refers to the polymeric material employed in the preparation of an electrode to impart mechanical integrity to the electrode constituents. The binder could be a composition of a fibrillating binder and a non-fibrillating binder. A fibrillating binder is a type of the binder constituent of an electrode, which has the property to form small fibrils under the application of shear force. The fibrillating binder provides the mechanical integrity of the electrode during manufacturing and provide optimal dispersion and adhesion of the active material and conductive additive to the current collector. The fibrillating binder in the present disclosure is polytetrafluoroethylene (PTFE). A non-fibrillating binder holds the active material particles within the electrode of a battery together to maintain a strong connection between the electrode and the contacts. These non- fibrillating binder materials are normally inert and have a significant role in the manufacturability of the battery. Examples of non-fibrillating binder of the present disclosure includes but not limited to polyethylene octene (EO polymer), polyethylene butene, poly propylene butene, poly propylene octene, or polyethylene vinyl acetate.

[0024] The term “jet milling” refers to the process of grinding one or more materials by using a high-speed jet of compressed air or inert gas to impact particles into each other and result in uniform blending and specific particle size of the mixture.

[0025] Ratios, concentrations, amounts, and other numerical data may be presented herein in a range format. It is to be understood that such range format is used merely for convenience and brevity and should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly recited. For example, weight percentage in the range of 0.5% to 2% should be interpreted to include not only the explicitly recited limits of 0.5% to 2% but also to include sub-ranges, such as 1% to 2%, 1.5% to 2% and so forth, as well as individual amounts, including fractional amounts, within the specified ranges, such as 0.8%, 1.5%, and 0.95%.

[0026] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of thedisclosure, the preferred methods, and materials are now described. All publications mentioned herein are incorporated herein by reference.

[0027] The present disclosure is not to be limited in scope by the specific embodiments described herein, which are intended for the purposes of exemplification only. Functionally equivalent products, compositions, formulations, and methods are clearly within the scope of the disclosure, as described herein.

[0028] As discussed in the background, there is a need in the art to develop a binder composition that results in an efficient electrode. The conventionally employed binder combination of PTFE- PVDF results in LiF formation and residues due to PTFE reactivity; leading to deteriorated electrochemical performance. Further, PVDF binder requires high processing temperature of about 160 °C and PVDF does not completely melt at lower temperature. These properties of PVDF results in an electrode film with insufficient peel strength, lower mechanical strength leading to poor flexibility and thus, a brittle electrode film. In the present disclosure PVDF is being replaced with a non-fluorinated polymer to reduce the reactivity in the graphite anode without compromising the electrode properties and the degree of fibrillation. Moreover, the ethylene-based polymers (35.7 mJ / m2) possess higher surface energy compared to the fluorinated binder (e.g. PTFE 19.5 mJ / m2, PVDF 30.7mJ / m2). Due to high surface energy, the use of ethylene-based non-fluorinated polymer in combination with PTFE provides good adhesion with current collector and electrode.

[0029] Accordingly, in an embodiment of the present disclosure, there is provided a binder composition comprising: a. a fibrillating binder; and b. a non-fibrillating binder of Formula (I)KCH2-CH(Ri))-(R2)]nFormula (I) wherein Ri is selected from H or Ci-4 alkyl; and R2is selected from C4-8 alphaolefins or vinyl acetate.

[0030] In an embodiment of the present disclosure, wherein the fibrillating binder and the non-fibrillating binder are in a weight ratio range of 1 :3 to 3 : 1.

[0031] In an embodiment of the present disclosure, wherein the non-fibrillating binder of Formula (I) is in a molecular weight range of 100 to 500 kDa.

[0032] In an embodiment of the present disclosure, wherein the non-fibrillating binder of Formula (I) has a tensile strength in a range of 16 to 28 MPa and exhibits tensile elongation of at least 350%.

[0033] In an embodiment of the present disclosure, wherein the non-fibrillating binder of Formula (I) is selected from polyethylene octene, polyethylene butene, poly propylene butene, poly propylene octene, polyethylene vinyl acetate, or combinations thereof.

[0034] In an embodiment of the present disclosure, wherein the fibrillating binder is polytetrafluro ethylene (PTFE).

[0035] In an embodiment of the present disclosure, there is provided an electrode composite comprising: a. an active material in a weight range of 96 to 98% with respect to total weight of the electrode composite; b. at least one conductive carbon in a weight range of 0.3 to 1.5% with respect to total weight of the electrode composite; c. the binder composition as disclosed herein; wherein the binder composition comprises the fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the electrode composite, and the non-fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the electrode composite.

[0036] In an embodiment of the present disclosure, wherein the active material is in a weight range of 96.5 to 97.5% with respect to total weight of the electrode composite; the at least one conductive carbon is in a weight range of 0.4 to 1% with respect to total weight of the electrode composite; and the binder composition comprises the fibrillating binder in a weight range of 0.5 to 1% with respect to the total weight of the electrode composite, and the non-fibrillating binder in a weight range of 0.5 to 1% with respect to the total weight of the electrode composite.

[0037] In an embodiment of the present disclosure, wherein the active material is selected from graphite, synthetic graphite, silicon, nickel-manganese-cobalt(NMC), lithium iron phosphate (LFP) and lithium nickel manganese oxide (LNMO) or combinations thereof.

[0038] In an embodiment of the present disclosure, wherein the conductive carbon is selected from superP, carbon nanotubes, graphite, graphene, ketjen black, carbon black, carbon fibers, or combinations thereof.

[0039] In an embodiment of the present disclosure, wherein the electrode composite exhibits a peel strength of at least 0.023 Kgf; and a tensile strength in a range of 205-240 Kgf / cm2. In another embodiment of the present disclosure, the electrode composite exhibits a peel strength of at least 0.023 Kgf; and a tensile strength in a range of 205-210 Kgf / cm2.

[0040] In an embodiment of the present disclosure, wherein the electrode composite exhibits an Initial Coulombic Efficiency (ICE) of at least 93% with a discharge capacity of at least 330 mAh g'1at ambient temperature when the electrode composite is a negative electrode composite.

[0041] In an embodiment of the present disclosure, there is provided a process of preparation of the electrode composite as disclosed herein, the process comprising: a. mixing an active material with at least one conductive carbon to obtain a first mixture; b. blending a non-fibrillating binder with a fibrillating binder to obtain a binder composition; c. mixing the first mixture with the binder composition to obtain a second mixture; d. high shear mixing the second mixture to obtain a third mixture; and e. jet milling the third mixture to obtain the electrode composite.

[0042] In an embodiment of the present disclosure, wherein the mixing in step (a) is carried out for a time in range of 10 to 30 min at a speed 1200-2000 rpm at a temperature in a range of 20 to 30 °C. In another embodiment of the present disclosure, wherein the mixing in step (a) is carried out in a Zeppelin mixer for a time in range of 10 to 30 min at a speed 1200-1500 rpm at a temperature in a range of 20 to 30 °C.

[0043] In an embodiment of the present disclosure, wherein the fibrillating binder is jet milled prior to blending with the non-fibrillating binder.

[0044] In an embodiment of the present disclosure, the fibrillating binder is jet milled at a milling pressure in a range of 2 to 5 mbar and feeding pressure in a rangeof 0.5 to 2 mbar. In another embodiment of the present disclosure, the fibrillating binder is jet milled at a milling pressure in a range of 2.5 to 4 mbar and feeding pressure in a range of 0.75 to 1.25 mbar.

[0045] In an embodiment of the present disclosure, the particle size of the fibrillating binder after jet milling is in a range of 300 to 400 micron.

[0046] In an embodiment of the present disclosure, wherein the blending in step (b) is carried out at a speed in the range of 1200 to 2000 rpm for a time period in a range of 10 to 60 minutes at a temperature in a range of 0 to 19°C. In another embodiment of the present disclosure, wherein the blending in step (b) is carried out at a speed in the range of 1200 to 1500 rpm for a time period in a range of 40 to 60 minutes at a temperature in a range of 0 to 19°C.

[0047] In an embodiment of the present disclosure, high shear mixing is carried out at a speed in a range of 2000 to 4000 rpm until temperature reaches a range of 70 to 85 °C. In an embodiment of the present disclosure, the high shear mixing is carried out at a speed in a range of 2500 to 3500 rpm until temperature reaches to a range of 70 to 85 °C.

[0048] In an embodiment of the present disclosure, the third mixture is cooled to a temperature in a range of 15 to 20 °C, under stirring at a speed in a range of 300 to 1000 rpm, prior to jet milling. In another embodiment of the present disclosure, the third mixture is cooled to a temperature in a range of 15 to 19 °C, under stirring at a speed in a range of 300 to 500 rpm, prior to jet milling.

[0049] In an embodiment of the present disclosure, the electrode composite is further subjected to calendaring to obtain an electrode fdm.

[0050] In an embodiment of the present disclosure, the electrode fdm has a thickness in a range of 50 to 100 micrometres.

[0051] In an embodiment of the present disclosure, the electrode fdm is further laminated upon a current collector to obtain an electrode.

[0052] In an embodiment of the present disclosure, there is provided an electrode comprising the electrode composite as disclosed herein.

[0053] In an embodiment of the present disclosure, there is provided an electrochemical cell comprising: a. an anode comprising the electrode composite as disclosed herein; b. a cathode; c. an electrolyte and d. a separator.EXAMPLES

[0054] The disclosure will now be illustrated with working examples, which is intended to illustrate the working of disclosure and not intended to take restrictively to imply any limitations on the scope of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice of the disclosed methods and compositions, the exemplary methods, devices, and materials are described herein. It is to be understood that this disclosure is not limited to particular methods, and experimental conditions described, as such methods and conditions may apply.Materials and Methods

[0055] The various chemicals and solvents used in the present disclosure are as follows:Active material- Synthetic Graphite (Ziehen)Conductive carbons - Super P(Imerys)Fibrillating binder- Polytetrafluoroethylene (PTFE) (Daiken) Non-fibrillating binder- Polyethylene octene (EO) (ExxonMobil) EXAMPLE 1Preparation of electrode and electrochemical cell

[0056] 97% active material (AM), 0.5% weight of a primary conductive carbon (CC1) and 0.5% of secondary conductive carbon (CC2), were mixed for 10-30 min in a Zeppelin mixer at a speed 1200 rpm at a temperature in a range of 20 to 30 °C, to obtain conducting carbon mixed active material (first mixture).

[0057] The fibrillating binder, PTFE was jet milled to reduce the particle size from 500-600 micron to 300-400 micron. PTFE was jet milled at 3mbar milling pressure and Imbar feeding pressure. A non-fibrillating binder 1% EO polymer and 1% jet- milled PTFE (fibrillating binder) were blended to obtain the binder composition.

[0058] The above blended binder composition was added to the first mixture and mixed at a speed of 1200 rpm for 60 minutes at lower temperature (below 19 °C) to achieve uniform distribution (second mixture).

[0059] The second mixture was then high shear mixed at a speed of 3000 rpm until temperature reaches 70 - 85 °C to obtain a third mixture.

[0060] The third mixture was then cooled to a temperature less than 19 °C at a speed of 300 rpm.

[0061] Finally, to uniformly distribute conductive carbons and binders throughout the electrode powder, the cooled third mixture was jet milled at 3mbar milling pressure and Imbar feeding pressure at low temperature (below 20 °C) for 90 minutes to obtain the electrode composite powder and stored at a temperature range of 15-5 °C.

[0062] The electrode powder was further subjected to calendaring at 150 °C at a high shear with a differential speed of 125 to 175% between the adjacent rollers to get the free-standing film (electrode film). The electrode is further laminated over a current collector to obtain the electrode.

[0063] An electrochemical cell was assembled, which includes a cathode (positive electrode) of layered metal oxides and an anode (negative electrode) obtained by the process as disclosed in the above example and the anode was disposed to face the cathode. An electrolyte of IM LiPF6 dissolved in carbonate solvent with added additives was placed between cathode and anode along with a separator. The electrochemical cell obtained from the process explained above was analyzed for its electrochemical performance.EXAMPLE 2Characterization of the Electrode Film

[0064] The laminated electrode film was tested for its physical properties before subjecting it to electrochemical testing. The important parameter to test the film adhesion with the current collector was the peel strength. Apart from peel strength testing, tensile strength testing was carried out to determine the fdm’s endurance under stress and not tearing up.Observation and Results

[0065] Physical appearance: From the digital images shown in Figure 1, it is evident that a free-standing film was obtained with the disclosed electrode composite of a binder composition of (PTFE+EO), which was similar to the film obtained with an electrode composite of a binder composition of (PTFE+PVDF).

[0066] Scanning Electron Microscope (SEM) Analysis: Figure 2a and 2b shows the SEM micrographs of electrode films made up of PTFE + PVDF and PTFE + EO binder composite, respectively. From the images it is observed that both binder composite systems exhibit good fibrillation density. However, it was observed that thicker fibrils were formed in PTFE+ EO composite binder system compared with the PTFE+PVDF composite system. These thicker fibrils were formed when EO threads were melted and made a network across the electrode and improved the compactness between the active material. This corroborated with the peel strength and tensile strength values of the film.

[0067] Peel strength : The peel strength was measured using scotch tape method where a scotch tape was pasted over the electrode in the dimension of (25mm length and 18 mm width). The prepared electrode was fixed with fixtures at top and bottom. Then a load was applied. The amount of load required to peel out the electrode was measured and tabulated in Table.1. It was seen that the peel strength of PTFE and PEO combination was rather better than the PTFE and PVDF combination. This is due to the higher surface energy of the EO polymer binder, which helped in better adhesion with the current collector than the PVDF.

[0068] Tensile Strength Analysis: Tensile strength was measured by using a dry electrode having a length (200-250mm), width (25-30mm) and thickness (100-120 pm) and fixing the dry electrode in the fixtures. Then a load was applied with a cross-sectional speed of 12.5mm / min. Tensile strength was determined from the Load versus displacement curve. The measured tensile strength values are tabulated in Table 1. The EO polymer is an elastomer and the elastomeric chain comprises alternate crystalline segments and soft segments. This arrangement of hard and soft segments makes the polymer anchor to the electrode components much stronger than PVDF. The tensile strength of the film was also better than the PTFE+PVDF film due to better networking in the film.

[0069] Table 1: Physical properties of PTFE+EO and PTFE+PVDF films.EXAMPLE 3Electrochemical Cell Performance

[0070] The electrochemical analysis was conducted using an electrode arrangement as described herein above, wherein the following electrolyte and solvent combinations were used. 1 M Lithium hexaflurophosphate, Ethylene carbonate, diethylene carbonate, dimethylene carbonate (Electrolyte 1); or 1.2 M Lithium hexaflurophosphate, Ethylene carbonate, diethylene carbonate, dimethylene carbonate (Electrolyte 2).Observation and Results

[0071] Electrochemical comparison data of PTFE+PVDF and PTFE+EO is shown in Table 2. Initial Coulombic Efficiency (ICE) was 95.42 % with a discharge capacity of 345.79 mAh g-1 at ambient temperature for PEO+PTFE Electrode. The first cycle ICE improved due to reduced PTFE reactivity with lithium for both electrolyte systems in PTFE + EO electrode. A flat discharge curve at 0.06 V was due to the intercalation of Li+ ions into the graphite (Figure 3). Subsequently, the 2nd and 3rd cycle almost overlapped with each other, which indicated good reversibility during the charge-discharge cycles (Table 3). The C-rate was 0.1C / 0.1C for charge and discharge.

[0072] Table 2: Electrochemical data comparison of PTFE+PVDF and PTFE+EO

[0073] Table 3: ICE for three cycles

[0074] Overall, the composition of PTFE and EO as binders in the present disclosure resulted in improvement in physical properties like peel strength and tensile strength and the initial Coulombic Efficiency (ICE) was 95.42 % with a discharge capacity of 345.79 mAh g-1 at ambient temperature.ADVANTAGES OF THE PRESENT DISCLOSURE

[0075] The present disclosure provides a binder composition of PTFE with a non- fibrillating, non-fluorinated binder (EO polymer) that has film formation propertiesthat can be used in the dry electrode process. The polymer properties are such that it can perform the same function as that of PVDF and PTFE combination either by fibrillation or by melt casting / extrusion.

[0076] The processing temperature of electrode fabrication was brought down to 100 °C, which further helps to reduce cost without compromising the electrode properties. Additionally, there is elimination of one fluorine -based binder in the dry electrode process.

[0077] Initial Coulombic Efficiency (ICE) is 95.42 % with a discharge capacity of345.79 mAh g'1at ambient temperature for EO+PTFE electrode, and also it showed reduced reactivity of Li with fluorine.

[0078] Additionally, EO+PTFE based electrode shows improvement in physical properties like peel strength and tensile strength.

Claims

I / We Claim:

1. A binder composition comprising: a. a fibrillating binder; and b. a non-fibrillating binder of Formula (I) f(CH2-CH(R )-(R2)]nFormula (I) wherein Ri is selected from H or Ci-4 alkyl; andR2 is selected from C4-8 alpha-olefins or vinyl acetate.

2. The binder composition as claimed in claim 1, wherein the fibrillating binder and the non-fibrillating binder are in a weight ratio range of 1 :3 to 3 : 1.

3. The binder composition as claimed in claim 1, wherein the non-fibrillating binder of Formula (I) is in a molecular weight range of 100 to 500 kDa.

4. The binder composition as claimed in claim 1, wherein the non-fibrillating binder of Formula (I) has a tensile strength in a range of 16 to 28 MPa and exhibits tensile elongation of at least 350%.

5. The binder composition as claimed in claim 1, wherein the non-fibrillating binder of Formula (I) is an elastomer or a plastomer.

6. The binder composition as claimed in claim 1, wherein the non-fibrillating binder of Formula (I) is selected from polyethylene octene, polyethylene butene, poly propylene butene, poly propylene octene, polyethylene vinyl acetate, or combinations thereof.

7. The binder composition as claimed in claim 1, wherein the fibrillating binder is polytetrafluro ethylene (PTFE).

8. An electrode composite comprising: a. an active material in a weight range of 96 to 98% with respect to total weight of the electrode composite; b. at least one conductive carbon in a weight range of 0.3 to 1.5% with respect to total weight of the electrode composite; and c. the binder composition as claimed in claim 1;wherein the binder composition comprises the fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the electrode composite; and the non-fibrillating binder in a weight range of 0.5 to 2% with respect to the total weight of the electrode composite.

9. The electrode composite as claimed in claim 8, wherein the active material is in a weight range of 96.5 to 97.5% with respect to total weight of the electrode composite; the conductive carbon is in a weight range of 0.4 to 1% with respect to total weight of the electrode composite; and the binder composition comprises the fibrillating binder in a weight range of 0.5 to 1% with respect to the total weight of the electrode composite, and the non-fibrillating binder in a weight range of 0.5 to 1% with respect to the total weight of the electrode composite.

10. The electrode composite as claimed in claim 8, wherein the active material is selected from graphite, synthetic graphite, silicon, silicon-carbon composites, nickel-manganese-cobalt (NMC), lithium iron phosphate (LFP) and lithium nickel manganese oxide (LNMO) or combinations thereof.

11. The electrode composite as claimed in claim 8, wherein the conductive carbon is selected from super P, carbon nanotubes, graphite, graphene, ketjen black, carbon black, carbon fibers, or combinations thereof.

12. The electrode composite as claimed in claim 8, wherein the electrode composite exhibits a peel strength of at least 0.023 Kgf; and a tensile strength in a range of 205-240 Kgf / cm2.

13. The electrode composite as claimed in claim 8, wherein the electrode composite exhibits an Initial Coulombic Efficiency (ICE) of at least 93% with a discharge capacity of at least 330 mAh g'1at ambient temperature when the electrode composite is a negative electrode composite.

14. A process of preparation of the electrode composite as claimed in claim 8, the process comprising: a. mixing an active material with at least one conductive carbon to obtain a first mixture;b. blending a non-fibrillating binder with a fibrillating binder to obtain a binder composition; c. mixing the first mixture with the binder composition to obtain a second mixture; d. high shear mixing the second mixture to obtain a third mixture; and e. jet milling the third mixture to obtain the electrode composite.

15. The process as claimed in claim 14, wherein the mixing in step (a) is carried out for a time period in range of 10 to 30 min at a speed 1200-2000 rpm at a temperature in a range of 20 to 30 °C.

16. The process as claimed in claim 14, wherein the fibrillating binder is jet milled prior to blending with the non-fibrillating binder at a milling pressure in a range of 2 to 5mbar and feeding pressure in a range of 0.5 to 2mbar.

17. The process as claimed in claim 14, wherein the blending in step (b) is carried out at a speed in the range of 1200 to 2000 rpm for a time period in a range of 10 to 60 minutes at a temperature in a range of 0 to 19°C.

18. The process as claimed in claim 14, wherein high shear mixing is carried out at a speed in a range of 2000 to 4000 rpm until temperature is in a range of 70 to 85 °C.

19. The process as claimed in claim 14, wherein the third mixture is cooled to a temperature in a range of 15 to 20 °C, under stirring at a speed in a range of 300 to 1000 rpm, prior to jet milling.

20. The process as claimed in claim 14, wherein the electrode composite is further subjected to calendaring to obtain an electrode film.

21. The process as claimed in claim 20, wherein the electrode film has a thickness in a range of 50 to 100 micrometres.

22. The process as claimed in claim 20, wherein the electrode film is further laminated upon a current collector to obtain an electrode.

23. An electrode comprising the electrode composite as claimed in claim 8.

24. An electrochemical cell comprising: a. an anode comprising the electrode composite as claimed in claim 8; b. a cathode;c. an electrolyte; and d. a separator.5

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