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Hybrid electrode for non-aqueous electrolyte secondary battery

A technology of mixing positive electrodes and reaction mixtures, applied in the field of positive electrodes, can solve problems such as rapid capacity loss

Inactive Publication Date: 2016-05-04
UNIVERSITE CATHOLIQUE DE LOUVAIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] QianHuang et al. (J.Pow.Sources233,2013,69-73) disclose a kind of containing soluble PTMA and LiFePO 4 electrodes that lead to rapid capacity loss

Method used

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  • Hybrid electrode for non-aqueous electrolyte secondary battery
  • Hybrid electrode for non-aqueous electrolyte secondary battery
  • Hybrid electrode for non-aqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0120] Synthesis of the second active material: cross-linked PTMA / C composite.

[0121] Cross-linked PTMA / C composites are synthesized by solvent-free, melt monomer polymerization. To impart conductivity, about 15% by weight of acetylene black was added to the reaction mixture. A highly dispersed PTMA-carbon material (intimate contact between two components) was fabricated. The addition of acetylene black was also found to increase the brittleness of the composite and ensure fine milling of the PTMA powder.

[0122] In a typical synthesis, 1 g of acetylene black (MTI Co., Ltd.) was mixed with 6 g of 2,2,6,6-tetramethyl-4-piperidinyl methacrylate (TMPM, TCI Co., Ltd.), 188 μl The ethylene glycol dimethacrylate cross-linking agent (AcrossOrganics) and 40 mg of recrystallized azoisobutyronitrile (AcrossOrganics) were thoroughly mixed, and a minimum amount of dichloromethane was added (2-5 milliliters were added dropwise, AcrossOrganics), to evenly disperse ingredients. The mi...

example 2

[0134] Example 1 is reproduced, except that LiCoO is used at a capacity ratio of 1:1 2 instead of LiFePO 4 . Figure 5 represents the hybrid PTMA / LiCoO according to the present invention 2 Electrode voltage distribution. The battery is slowly charged at C / 5, and then discharged at a higher rate of C / 1.5.

example 3

[0136] Example 1 is reproduced except that LiMn is used at a capacity ratio of 1:5 2 o 4 instead of LiFePO 4 . Figure 6 represents the hybrid PTMA / LiMn according to the present invention 2 o 4 Electrode voltage distribution. The cells were charged slowly at C / 5, then pulse discharged at a very high rate with a 1 hour relaxation time. It is evident that each time a high discharge pulse is applied, no LiMn 2 o 4platform, only PTMA was observed. During the relaxation time LiMn 2 o 4 Charge the PTMA so that it can again deliver a high pulse discharge.

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Abstract

The present invention relates to hybrid positive electrode comprising a composition which comprises a first active material being a lithium-containing compound, a sodium- containing compound, or an electroactive conjugated polymer; a second active material being a polymer containing a nitroxide radical, and electrically conductive particles. In another aspect, the present invention relates to a non-aqueous electrolyte secondary battery comprising a hybrid positive electrode according to the present invention, a negative electrode and an electrolyte.

Description

technical field [0001] The invention mainly relates to the field of non-aqueous electrolyte secondary batteries. In particular, the present invention relates to a positive electrode having improved input characteristics (for example, pulse charging characteristics) without a significant drop in energy density, and having improved output characteristics. Background technique [0002] In order to meet the needs of manufacturing electric vehicles, high specific energy, high power density, long cycle life, low cost and safer batteries are required (Tarasconetal., Nature, 2001, 414, 359-367; Armand etal., 2008, 451, 652-657; Choietal ., Angewandte Chemie International Edition, 2012, 51, 9994-10024). Lithium-ion batteries currently have the highest energy density, but are limited by low power density. There is always a trade-off between high specific energy and high power density. Lithium-ion batteries store energy through reversible Coulombic reactions that take place at two e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/58H01M4/60H01M4/62H01M10/052H01M4/505H01M4/525
CPCH01M4/364H01M4/485H01M4/505H01M4/525H01M4/5825H01M4/602H01M4/625Y02E60/10H01M4/13H01M10/052H01M2004/028
Inventor 亚历山德鲁·弗拉德让·弗朗索瓦·戈伊索兰·梅林特
Owner UNIVERSITE CATHOLIQUE DE LOUVAIN