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A lithium ion battery and its preparation process

A lithium-ion battery and preparation technology, applied in the field of phosphorene composite graphite lithium-ion battery and its preparation, can solve the problems of poor mechanical stress, low electrochemical performance, poor thermal stability, etc., to improve charge and discharge performance, improve Rate performance, effect of reducing diffusion internal resistance

Active Publication Date: 2022-04-26
宁德邦源能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problems of low electrochemical performance, poor thermal stability and poor mechanical stress caused by interfacial effects in existing lithium-ion battery materials, and provides a simple and effective preparation method with excellent electrochemical performance, high stability, A stable cycle output high specific capacity ion battery with three electrochemical reactions and its preparation process

Method used

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  • A lithium ion battery and its preparation process
  • A lithium ion battery and its preparation process
  • A lithium ion battery and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Add 0.1 part of graphite microparticles to 0.5 mol / l, 10 L ammonium borate aqueous solution, stir for 12 hours, and freeze-dry.

[0032] 2) Encapsulate the mixture of phosphorene and graphite in step 1) with 10 parts and 90 parts respectively in a silver tube (inner diameter: 4.90 mm).

[0033] 3) The silver tube was placed in a hydrothermal system (model HR-1B-2, LECO Tem-Pres) and heated at 300-550° C. and 0.1-0.4 GPa for 1 hour.

[0034] 4) The pressure in the autoclave was quenched immediately by releasing the pressure valve, and the autoclave was naturally cooled to room temperature to obtain a black compound.

[0035] 5) Add 10 parts by weight of acetylene black and 10 parts by weight of binder to the product of step 4), grind and coat the surface of the copper foil current collector, dry, card, and press to obtain the negative electrode material electrode sheet.

[0036] 6) Put the electrode sheet, diaphragm, LB-008 electrolyte with crown ether grafted chitos...

Embodiment 2

[0039] 1) Add 0.1 part of graphite microparticles to 0.5 mol / l, 10 L ammonium borate aqueous solution, stir for 12 hours, and freeze-dry.

[0040] 2) Encapsulate the mixture of phosphorene and graphite in step 1) with 15 parts and 85 parts respectively in a silver tube (inner diameter 4.90mm).

[0041] 3) The silver tube was placed in a hydrothermal system (model HR-1B-2, LECO Tem-Pres) and heated at 300-550° C. and 0.1-0.4 GPa for 1 hour.

[0042] 4) The pressure in the autoclave was quenched immediately by releasing the pressure valve, and the autoclave was naturally cooled to room temperature to obtain a black compound.

[0043] 5) Add 10 parts by weight of acetylene black and 10 parts by weight of binder to the product of step 4), grind and coat the surface of the copper foil current collector, dry, card, and press to obtain the negative electrode material electrode sheet.

[0044] 6) Put the electrode sheet, diaphragm, LB-008 electrolyte with crown ether grafted chitosan...

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Abstract

The invention relates to a lithium-ion battery consisting of a current collector, a positive electrode material, a negative electrode material and an electrolyte solution. LB‑008 electrolyte with chitosan additive, phosphorene composite graphite obtained by high-temperature calcination, phosphorene prepared from sodium dihydrogen phosphate and raw materials, and phosphorene doped with graphite to expand the graphite layer spacing, which is conducive to improving the adhesion of lithium ions rate, and phosphorene can undergo a redox reaction with lithium, which can further increase the attachment rate of lithium ions, thereby increasing the specific capacity of carbon-based graphite. The electrolyte is LB‑008 electrolyte containing crown ether grafted chitosan additive, crown ether grafted chitosan additive provides a stable ion transmission channel, can improve its rate performance, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery preparation, and in particular relates to a phosphorene composite graphite lithium ion battery with high specific capacity and a preparation process thereof. Background technique [0002] In recent years, with the advent of the 5G era, we have seen opportunities and opportunities for development. The strengthening of communication means will inevitably force the change of production mode, which will lead to the upgrading of people's consumption and lifestyle. The fragmentation of time will inevitably change the direction of future product development. The degree of integration, intelligence and portability are the primary factors we must consider. The development of 3C digital, wearable electronic devices, electric vehicles and other products has increasingly high requirements for their energy carriers. Although compared with fossil energy, secondary batteries have lower energy densi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M4/62H01M4/139H01M10/0525H01M10/058C01B32/21C01B25/00
CPCY02E60/10Y02P70/50
Inventor 胡冲丽杜小君
Owner 宁德邦源能源科技有限公司
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