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Lithium ion battery electrolyte, battery negative electrode and electrochemical energy storage device

A lithium-ion battery and battery negative electrode technology, which is applied to battery electrodes, fuel cell-type half-cells, secondary battery-type half-cells, electrochemical generators, etc., can solve the problem of low ion conductivity and poor battery high-current discharge and other issues, to achieve the effect of improving charge-discharge cycle performance, charge-discharge cycle and high-temperature storage performance

Active Publication Date: 2020-11-03
香河昆仑新能源材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium-ion battery electrolytes are generally divided into liquid electrolytes, polymer solid electrolytes and gel polymer solid-liquid composite electrolytes according to the phase state. Although the safety of polymer solid-state and gel polymer solid-liquid composite electrolytes has certain However, their fatal defect is that the ionic conductivity of the electrolyte is low, which leads to the poor discharge of the battery at a large current.

Method used

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  • Lithium ion battery electrolyte, battery negative electrode and electrochemical energy storage device
  • Lithium ion battery electrolyte, battery negative electrode and electrochemical energy storage device
  • Lithium ion battery electrolyte, battery negative electrode and electrochemical energy storage device

Examples

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Effect test

Embodiment 1

[0044] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / artificial graphite battery, comprising positive pole, negative pole, PE / PP diaphragm, and electrolytic solution, wherein said electrolytic solution is non-aqueous electrolytic solution, and the total weight of said non-aqueous electrolytic solution is 100%, contains the embodiment of table 1 1 The components shown in mass percentage and 15% LiPF 6 Salt.

Embodiment 2

[0046] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / artificial graphite battery, comprising positive pole, negative pole, separator, and electrolytic solution, wherein said electrolytic solution is non-aqueous electrolytic solution, and the gross weight of said non-aqueous electrolytic solution is 100%, contains table 1 embodiment 2 Components in mass percent and 15% LiPF 6 Salt.

Embodiment 3

[0048] A kind of LiNi 0.5 co 0.2 mn 0.3 o 2 / artificial graphite battery, comprising positive pole, negative pole, diaphragm, and electrolytic solution, wherein said electrolytic solution is non-aqueous electrolytic solution, and the gross weight of said non-aqueous electrolytic solution is 100%, contains table 1 embodiment 3 Components in mass percent and 15% LiPF 6 Salt.

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Abstract

The present invention provides a lithium ion battery electrolyte, a battery negative electrode and an electrochemical energy storage device, the lithium ion battery electrolyte comprises a functionalelectrolyte additive, and the functional electrolyte additive comprises a boron-oxygen-based compound represented by a formula I. When the lithium ion battery electrolyte is applied to a high voltagesystem, the expansion of a battery can be inhibited, and internal resistance of a battery is reduced. When the lithium ion battery electrolyte is applied to a lithium ion battery, a layer of protective film with extremely high stability can be formed on the surface of a negative electrode material, the expansion of the battery is inhibited, and the internal resistance of the battery is reduced, sothat the high-temperature performance of the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a lithium ion battery electrolyte, a negative electrode of the battery and an electrochemical energy storage device. Background technique [0002] Electrolyte is an important part of lithium-ion batteries, it plays the role of transporting lithium ions between the positive and negative electrodes. The safety of the battery, the charge-discharge cycle, the operating temperature range and the charge-discharge capacity of the battery all have an important relationship with the electrochemical performance of the electrolyte. Lithium-ion battery electrolytes are generally divided into liquid electrolytes, polymer solid electrolytes and gel polymer solid-liquid composite electrolytes according to the phase state. Although the safety of polymer solid-state and gel polymer solid-liquid composite electrolytes is somewhat However, their fatal flaw is that the ionic c...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M4/131H01M4/133H01M4/134H01M10/052H01M10/0525H01M12/08H01G11/30H01G11/32H01G11/46H01G11/64
CPCH01M10/0567H01M4/131H01M4/133H01M4/134H01M10/0525H01M10/052H01M12/08H01G11/64H01G11/30H01G11/32H01G11/46H01M2300/0025Y02E60/10
Inventor 顿温新申海鹏孙春胜张和平汪宇凡
Owner 香河昆仑新能源材料股份有限公司