Electrolyte additive, electrolyte, and secondary battery
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An electrolyte additive and electrolyte technology, which are applied in the fields of secondary batteries, electrolytes, and electrolyte additives, can solve the problems of poor safety performance of positive and negative electrode materials with high gram capacity, etc.
Active Publication Date: 2021-10-15
EVERGRANDE NEW ENERGY TECH SHENZHEN CO LTD
View PDF3 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] The purpose of the present invention is to provide an electrolyte additive, an electrolyte, and a secondary battery, aiming to solve the te...
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0058] an electrolyte , and its preparation includes the steps of: mixing 300g of EC, 600g of EMC, and 100g of DEC in a glove box with a water content of less than 1ppm and an oxygen content of less than 2ppm to form a mixed organic solvent; then, adding an appropriate amount of fully dried LiPF 6 The lithium salt concentration of the electrolyte is 1 mol / L to obtain a basic electrolyte. Then add 0.05% SPNCS-1 to the basic electrolyte, Electrolyte E1 is obtained.
[0059] A lithium ion battery , its production includes the steps:
[0060] ① Mix the positive electrode material Ni83, carbon black, carbon nanotubes, and polyvinylidene fluoride PVDF in a ratio of 100:0.6:0.6:1.5, coat it on a 12μm aluminum foil, and then dry it at 85°C to obtain the positive electrode piece.
[0061] ② Mix graphite material, carbon black, styrene-butadiene rubber SBR, and sodium carboxymethyl cellulose CMC in a ratio of 100:0.9:1.9:1.5, coat it on an 8μm copper foil, and then dry it at 90°C ...
Embodiment 2
[0065] an electrolyte , the difference from Example 1 is: add 0.1% SPNCS-2 in the electrolyte, Electrolyte E2 is obtained.
[0066] A lithium ion battery , which differs from Example 1 in that: the electrolyte E2 is used, and the obtained lithium ion battery is C2.
Embodiment 3
[0068] an electrolyte , its difference from Example 1 is: add 0.5% SPNCS-3 in the electrolyte, Electrolyte E3 is obtained.
[0069] A lithium ion battery , which differs from Example 1 in that: the electrolyte E3 is used, and the obtained lithium ion battery is C3.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention belongs to the technical field of batteries, and particularly relates to an electrolyte additive, an electrolyte and a secondary battery. The structural general formula of the electrolyte additive is shown in a following formula I, and x and Y in the formula I are respectively and independently selected from one of isothiocyano group, cyclohexyl group, alkoxy group, phenyl group and halogen. According to the electrolyte additive provided by the invention, side reactions on the surface of a positive electrode can be reduced, flame-retardant phosphorus free radicals are generated, and the cycling stability and the safety performance of a pole piece are improved; and an SEI film can be polymerized on the surfaces of a positive electrode and a negative electrode, so that the elasticity of the SEI film is improved, the SEI film can better adapt to the huge volume expansion and shrinkage stress of electrode materials, such as a silicon substrate, etc., in a lithium intercalation and deintercalation process, and the cycling stability and safety of the battery are improved.
Description
technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to an electrolyte additive, an electrolyte, and a secondary battery. Background technique [0002] Lithium-ion batteries are widely used in mobile phones, computers, cameras, electric vehicles and other fields due to their advantages such as high specific energy, long cycle life, and no memory effect. With the continuous development of science and technology, various application fields have put forward higher requirements for the performance of lithium-ion batteries. Among them, the most urgent thing is to improve the energy density of lithium-ion batteries under the premise of ensuring safety. At present, the industry is pursuing higher energy density of lithium batteries, which is also an important indicator reflecting battery technology. Positive and negative materials with higher gram capacity need to be used. As the most commercialized choice at present, the posi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more