Secondary battery electrolyte, battery cathode and electrochemical energy storage device

A secondary battery, electrolyte technology, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problems of graphite and electrolyte solvent incompatibility, low compaction density, low capacity, etc., to achieve high temperature cycle The effect of good performance and good normal temperature cycle performance

Active Publication Date: 2021-07-23
HUZHOU KUNLUN YIENKE BATTERY MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it has disadvantages such as low capacity and low compaction density, which limit its wide application in secondary battery anode materials.
[0004] Therefore, in this field, it is expected to develop a secondary battery that can solve the above-mentioned graphite and electrolyte solvent incompatibility problem, thereby improving the cycle life and electrochemical performance of the battery.

Method used

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  • Secondary battery electrolyte, battery cathode and electrochemical energy storage device
  • Secondary battery electrolyte, battery cathode and electrochemical energy storage device
  • Secondary battery electrolyte, battery cathode and electrochemical energy storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / Artificial graphite battery (primary particle diameter d>1 μ m), including positive pole, negative pole, diaphragm, and electrolyte, wherein said electrolyte is non-aqueous electrolyte, and the total weight of said non-aqueous electrolyte is 100%, containing Components in mass percent shown in Table 1 Example 1 and 15% LiPF 6 Salt.

Embodiment 2

[0045] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / Natural graphite battery (primary particle diameter d6 Salt.

Embodiment 3

[0047] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / Artificial graphite battery (primary particle diameter d6 Salt.

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Abstract

The present invention provides a secondary battery and an electrochemical energy storage device. The secondary battery comprises a positive electrode, a negative electrode and an electrolyte, wherein a material of the negative electrode is graphite, the primary particle diameter of the graphite is less than 1 [mu] m, and a solvent in the electrolyte is a non-aqueous organic solvent containing propylene carbonate; the secondary battery provided by the invention has good normal-temperature cycle performance, high-temperature cycle performance and good low-temperature discharge performance.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and relates to a secondary battery electrolyte, a negative electrode of the battery and an electrochemical energy storage device. Background technique [0002] In recent years, carbon has attracted extensive attention as an anode material for secondary batteries. The electrochemical properties of different types of carbon vary greatly. Among them, graphite is considered to be a more suitable negative electrode material due to its high bulk capacity and low electrode potential (0.01-0.2V), but there are still some insurmountable weaknesses. Anode materials with better performance are still an important topic in secondary battery research. The negative electrode of the secondary battery is made of a negative electrode active material carbon material or non-carbon material, a binder, and an additive mixed to form a paste glue that is evenly coated on a copper foil, dried and rolled. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/587H01M10/0569H01M10/0525H01M10/054
CPCH01M4/583H01M4/587H01M10/0569H01M10/0525H01M10/054H01M2300/0028H01M2300/004Y02E60/10
Inventor 顿温新汪宇凡郭连晓孙春胜张和平
Owner HUZHOU KUNLUN YIENKE BATTERY MATERIAL CO LTD
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