Shenzhen Capchem Technology Co., Ltd.

Huizhou Capchem Chemicals Co., Ltd

Xiaoxia Xiang

Yunxian Qian

Shiguang Hu

Yonghong Deng

Zhongtian Zheng

Dejun Xiong

Qun Chen

Chaowei Cao

Hongmei Li

Longliang Xue

Xuejun Chen

Zhaowei Cao

Jiahao Huang

Yingjie Cao

Zhengsheng Zhang

In order to overcome the problem that the electrochemical performance of the existing supercapacitor is seriously deteriorated at low temperature, the application provides a supercapacitor, comprising a positive electrode, a negative electrode and an organic electrolyte solution, wherein the organic electrolyte solution comprises an organic electrolyte, a proton inert solvent and an additive, and the additive comprises a compound represented by structural formula 1: The supercapacitor provided by the application has lower ESR (equivalent series resistance) and better high and low temperature performances.

Supercapacitor

Provided is a non-aqueous electrolyte for a lithium ion battery, comprising one or more compounds A represented by structure 1, wherein Ris independently selected from a halogen atom or a group containing 1-5 carbon atoms, and Ris independently selected from a group containing 0-5 carbon atoms; Xis independently selected from a phosphorus oxygen group or a phosphorus atom; Xis independently selected from an oxygen atom, a carboxylate group, a sulfonate group or a carbonate group. The non-aqueous electrolyte can improve the high-temperature cycle performance of the battery and reduce the impedance. The lithium ion battery prepared with the non-aqueous electrolyte possesses good high-temperature resistant properties and good cycle performance, which can effectively avoid the instability of the lithium ion battery under high temperature conditions and improve the high and low temperature cycle performance of the lithium ion battery.

Non-aqueous electrolyte including caged bicyclic phosphate, and lithium ion battery including the same

Provided is a secondary battery, comprising a positive electrode, the positive electrode comprises a positive electrode material layer, and the positive electrode material layer comprises a positive electrode active material and a compound represented by structural formula I: 

Secondary battery

The present invention relates to the electrochemical field, particularly to an electrolyte solute and an electrolyte that are used for a high-voltage supercapacitor, and a high-voltage supercapacitor using the electrolyte. The anion of the electrolyte solute may be one or more selected from tetrafluoroborate, hexafluorophosphate, bis(trifluoromethylsulfonyl) imide, tris (trifluoromethylsulfonyl) methyl and perfluoroalkyl sulfonate, and the cation may be N-methyl-1,4-diazabicyclo[2.2.2]octane ammonium, N,N-dimethyl-1,4-diazabicyclo[2.2.2]octane ammonium, N-methyl-1-azabicyclo[2.2.2]octane ammonium. The high-voltage supercapacitor fabricated by using the electrolyte formulated by the electrolyte solute of the present invention can work stably for a long period of time at a voltage of 2.7 V to 3.2 V, the energy density is greatly increased, the property of high power density is maintained, and the working life is prolonged.

Electrolyte solute, electrolyte, and high-voltage supercapacitor

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Guangdong, China

Xiaoxia Xiang