32results about How to "Improve lithium ion mobility" patented technology

A rechargeable, stackable, thin film, solid-state lithium electrochemical cell, thin film lithium battery and method for making the same is disclosed. The cell and battery provide for a variety configurations, voltage and current capacities. An innovative low temperature ion beam assisted deposition method for fabricating thin film, solid-state anodes, cathodes and electrolytes is disclosed wherein a source of energetic ions and evaporants combine to form thin film cell components having preferred crystallinity, structure and orientation. The disclosed batteries are particularly useful as power sources for portable electronic devices and electric vehicle applications where high energy density, high reversible charge capacity, high discharge current and long battery lifetimes are required.

A lithium ion-conducting compound, having a garnet-like crystal structure, and having the general formula: Li_n[A_{(3-a′-a″)}A′_(a′)A″_(a″)][B_{(2-b′-b″)}B′_(b′)B″_(b″)][C′_(c′)C″_(c″)]O₁₂, where A, A′, A″ stand for a dodecahedral position of the crystal structure, where A stands for La, Y, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and/or Yb, A′ stands for Ca, Sr and/or Ba, A″ stands for Na and/or K, 0<a′<2 and 0<a″<1, where B, B′, B″ stand for an octahedral position of the crystal structure, where B stands for Zr, Hf and/or Sn, B′ stands for Ta, Nb, Sb and/or Bi, B″ stands for at least one element selected from the group including Te, W and Mo, 0<b′<2 and 0<b″<2, where C and C″ stand for a tetrahedral position of the crystal structure, where C stands for Al and Ga, C″ stands for Si and/or Ge, 0<c′<0.5 and 0<c″<0.4, and where n=7+a′+2·a″−b′−2·b″−3·c′−4·c″ and 5.5<n<6.875.

In a Li ion conductivity oxide solid electrolyte containing lithium, lanthanum, and zirconium, a part of oxygen is substituted by an element M (M=N, Cl, S, Se, or Te) having smaller electronegativity than oxygen.

An additive for an electrolyte solution includes a lithium salt having an oxalato complex as an anion and a compound represented by following Chemical Formula 1.

Wherein, a represents C or Si, b represents H or F, and n represents an integer of 1 to 5. A non-aqueous electrolyte solution including the additive and a lithium secondary battery including the electrolyte solution also are provided.

An organic-inorganic silicon structure-containing block copolymer including a first domain including an ion conductive polymer block; and a second domain including a polymer block including a non-conducting polymer and an organic-inorganic silicon structure, wherein the organic-inorganic silicon structure is connected to a side chain connected to a backbone of the non-conducting polymer.

The invention provides a silicon oxide-graphene coated high-nickel lithium battery anode material and a preparation method. A lithium source, a nickel source, a cobalt source, a manganese source and an accessory solvent are prepared into a high-nickel ternary precursor sizing agent by mixing and ball-grinding; a silk screen fixed with nano-sized mesoporous silicon oxide microballoons is dipped into the sizing agent; later, a high-nickel ternary powder material supported by silica dioxide is obtained by pre-sintering, sintering, ultrasonic smashing and grinding; and then, the high-nickel ternary powder is arranged in an organic solvent and configured into turbid liquid; a graphene slice layer is stripped off by a physical means, the turbid liquid is added, and stirring is carried out; low-temperature heat treatment is performed after filtering and drying; and the silicon oxide-graphene coated high-nickel ternary anode material is obtained. According to the anode material and the preparation method in the invention, the problems that the structure of the high-nickel ternary anode material collapses and volume deforms seriously during the lithium ion deintercalation process under thecondition of maintaining capacity and rate performance; the process is simple, and continuous production is facilitated.

The invention belongs to the technical field of battery negative electrode materials, and provides a phenyl organic acid compound modified graphite negative electrode material, the negative electrodematerial comprises a phenyl organic acid compound and graphite, and the weight ratio of the phenyl organic acid compound to the graphite is 1-6: 100; according to the structural general formula of thephenyl organic acid compound, RA1 is a hydrocarbyl organic acid group containing a carbon-carbon single bond, a carbon-carbon double bond or a carbon-carbon triple bond, and the organic acid group isone or two of sulfonic acid, phosphonic acid, boric acid and carboxylic acid. The invention also provides a preparation method of the negative electrode material. According to the preparation method,the first coulombic efficiency of the graphite negative electrode is remarkably improved, the lithium consumption caused by rupture and reforming of a SEI membrane in the long-term cycle process of the battery is greatly reduced, and the long-term cycle stability and the high-temperature cycle stability of the battery are remarkably improved.

The invention discloses a mixed lithium-rich positive electrode material and a preparation method and application thereof. The mixed lithium-rich positive electrode material is prepared by mixing a layered lithium-rich manganese-based positive electrode material and a lithium-rich disordered rock salt structure positive electrode material, wherein the chemical general formula of the layered lithium-rich manganese-based positive electrode material is xLi2MnO3.(1-x) LiMO2, and x is greater than 0 and less than 1; the chemical general formula of the lithium-rich disordered rock salt structure positive electrode material is Li1 + aTibMcNidO2, wherein 0.1<a<0.3, 0.1<b<0.4, 0.1<c<0.4, 0.2<d<0.4 and a+4b+6c+2d=3. The lithium-rich manganese-based positive electrode material component in the positive electrode material has a typical layered structure, transition metal redox and lattice oxygen redox exist in the charging/discharging process at the same time, and the lithium-rich disordered rock salt structure positive electrode material component has a three-dimensional disordered cation skeleton structure, which can stabilize the oxygen lattices and oxygen variable valence reaction in the lithium-rich oxide positive electrode material, and improve the lithium ion migration capability; the two positive electrode materials generate a specific synergistic effect, advantage complementation is realized, the material consistency is good, the performance is controllable, and the defects in the prior art are overcome.

A composite solid electrolyte including: a porous nanostructure; and a solid electrolyte disposed on a surface of the porous nanostructure, wherein the composite solid electrolyte satisfies Equation 1

0<T_SE/D<4  Equation 1

wherein T_SE is a thickness of the solid electrolyte, and D is an average diameter of pores of the porous nanostructure.

The present invention relates to a solid polymer electrolyte including a porous substrate formed of an inorganic fiber containing an ethylenically unsaturated group, a polymer compound coupled to the inorganic fiber and including a polymer network in which an oligomer containing a (meth)acrylate group is coupled in a three-dimensional structure, and a lithium salt, and to a lithium secondary battery including the same.

A positive electrode active material includes a lithium transition metal oxide represented by Formula 1, and a lithium-containing inorganic compound layer formed on a surface of the lithium transition metal oxide,

Li_1+a(Ni_bCo_cX_dM¹_eM²_f)_1−aO₂   [Formula 1]

• • in Formula 1, X is at least one selected from the group consisting of manganese (Mn) and aluminum (Al), M¹ is at least one selected from the group consisting of sulfur (S), fluorine (F), phosphorus (P), and nitrogen (N), M² is at least one selected from the group consisting of zirconium (Zr), boron (B), cobalt (Co), tungsten (W), magnesium (Mg), cerium (Ce), tantalum (Ta), titanium (Ti), strontium (Sr), barium (Ba), hafnium (Hf), F, P, S, lanthanum (La), and yttrium (Y), 0≤a≤0.1, 0.6≤b≤0.99, 0≤c≤0.2, 0≤d≤0.2, 0<e≤0.1, and 0<f≤0.1. A method of preparing the positive electrode active material, a positive electrode and a lithium secondary battery are also provided.

Disclosed is a cathode material comprising a mixture of an oxide powder (a) defined herein and an oxide powder (b) selected from the group consisting of an oxide powder (b1) defined herein and an oxide powder (b2) defined herein and a combination thereof wherein a mix ratio of the two oxide powders (oxide powder (a): oxide powder (b)) is 50:50 to 90:10. The cathode material uses a combination of an oxide powder (a) and 50% or less of an oxide powder (b) which can exert high capacity, high cycle stability, superior storage stability and high-temperature stability, thus advantageously exhibiting high energy density and realizing high capacity batteries.