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Lithium ion battery

A lithium-ion battery, cobalt nitrate technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems affecting the rate and cycle performance, volume expansion/shrinkage, powdering of electrode materials, etc., to improve cycle performance and stability performance, improve the transmission speed, and facilitate the effect of load distribution

Active Publication Date: 2022-03-22
广东顺盈森能源有限公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are a series of problems in using it as an anode material: (1) Poor electronic conductivity; (2) There is obvious volume expansion / shrinkage during the cycle, which causes the powdering of the electrode material and affects the rate and cycle performance.

Method used

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Examples

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Effect test

Embodiment 1

[0014] Dissolve 10mmol of cobalt nitrate, 20mmol of ferric nitrate and 0.5mmol of yttrium acetate in 20ml of deionized water, then add 3mmol of hexamethylenetetramine and 8mmol of urea, stir well, and place the mixture in a high-pressure hydrothermal reaction kettle for Hydrothermal reaction, the temperature is 180 degrees Celsius, the reaction time is 10h; hollow nano-spherical Y-doped CoFe 2 o 4 ;

[0015] Y-doped CoFe 2 o 4 Wash with deionized water and ethanol alternately, then dissolve in 20ml of ethylene glycol to form a suspension, add 3mmol potassium permanganate and 1mmol glycine to the suspension, heat and reflux at 100°C for 12h, and calcinate the product at 250°C for 30min, Thus, nano-core-shell spherical Y-doped CoFe 2 o 4 / γ-MnO 2 .

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Abstract

The invention relates to a lithium ion battery, which is characterized in that Y-CoFe2O4 / gamma-MnO2 is adopted as a negative electrode material, and a preparation process of the lithium ion battery comprises the following steps: dissolving cobalt nitrate, ferric nitrate and yttrium acetate in deionized water, then adding hexamethylenetetramine and urea, uniformly stirring, putting the mixed solution into a high-pressure hydrothermal reaction kettle, carrying out hydrothermal reaction at the temperature of 180-200 DEG C, filtering, washing, and drying to obtain the lithium ion battery. The reaction time is 10 to 20 hours; the Y-doped CoFe2O4 in the nanometer spherical shape is obtained; and alternately washing the Y-doped CoFe2O4 with deionized water and ethanol, dissolving the Y-doped CoFe2O4 in ethylene glycol to form a suspension, adding potassium permanganate and glycine into the suspension, carrying out heating reflux at 90-100 DEG C for 12-20 h, and calcining the product at 200-400 DEG C for 30-60 min to obtain the nano core-shell spherical Y-doped CoFe2O4 / gamma-MnO2.

Description

technical field [0001] The invention relates to a lithium ion secondary battery, in particular to a negative electrode material with a hollow core-shell spherical structure and a preparation method thereof. Background technique [0002] With the increasing shortage of traditional fossil energy, environmental pollution, and climate warming, environmentally friendly new energy technologies have become one of the current development and application hotspots; rechargeable lithium-ion secondary batteries have The advantages of high energy, high specific power, long cycle life, small self-discharge, and no memory effect have been widely used in portable electronic devices, power tools, energy storage devices, electric vehicles and hybrid electric vehicles. [0003] Nanoscale transition metal oxides have attracted extensive attention in recent years due to their high theoretical specific capacities. However, there are a series of problems in using it as an anode material: (1) poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/525H01M4/50C01G51/00C01G45/02B82Y30/00
CPCH01M10/0525H01M4/525H01M4/502C01G51/00C01G45/02B82Y30/00H01M2004/027C01P2004/32C01P2004/82C01P2004/64C01P2004/03Y02E60/10
Inventor 王震
Owner 广东顺盈森能源有限公司
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