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Battery negative electrode material and preparation method and application thereof

A battery negative electrode and composite material technology, applied in electrode manufacturing, battery electrodes, negative electrodes, etc., can solve problems such as low actual capacity and poor conductivity

Inactive Publication Date: 2021-03-09
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, MXene is prone to oxidation and self-stacking, which leads to poor electrical conductivity, and its actual capacity is very low due to the presence of surface functional groups.

Method used

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  • Battery negative electrode material and preparation method and application thereof
  • Battery negative electrode material and preparation method and application thereof
  • Battery negative electrode material and preparation method and application thereof

Examples

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preparation example Construction

[0029] The invention provides a preparation method of battery negative electrode material, comprising the following steps:

[0030] After mixing MXene, nickel salt, weak base and water, perform a hydrothermal reaction to obtain a composite material of nickel hydroxide and MXene;

[0031] After mixing the composite material of nickel hydroxide and MXene with amidinothiourea, heat treatment is carried out to obtain the battery negative electrode material.

[0032] In the present invention, unless otherwise specified, all preparation materials are commercially available products well known to those skilled in the art.

[0033] In the invention, after mixing MXene, nickel salt, weak base and water, a hydrothermal reaction is carried out to obtain a composite material of nickel hydroxide and MXene. The present invention does not have any special limitation on the type of MXene, and the type well known to those skilled in the art can be used. In the present invention, the type of ...

Embodiment 1

[0059] 1mmol (0.1676g) Ti 3 C 2 MXene and 70mL deionized water were mixed under ultrasonic conditions for 30min to obtain Ti 3 C 2 MXene dispersion with 0.75mmol NiSO 4 ·6H 2 O and 0.4 g of hexamethylenetetramine were mixed for 30 min under stirring, then transferred to a hydrothermal reaction kettle, carried out a hydrothermal reaction for 4 h at a temperature of 100° C., cooled to room temperature, followed by centrifugation and drying. Get Nickel Hydroxide and Ti 3 C 2 Composite materials of MXene;

[0060] The 0.1g nickel hydroxide and Ti 3 C 2 The composite material of MXene, 0.02g of amidinothiourea and 60mL of deionized water were mixed under stirring conditions for 30min and then dried. After the dried sample was ground for 5min, it was transferred to a tube furnace, under the protection of argon, with 5 The heating rate of ℃ / min was raised to 350 ℃, and after 1.5h of heat preservation, it was cooled to room temperature with the furnace, and the battery negat...

Embodiment 2

[0063] 1mmol (0.1676g) Ti 3 C 2 MXene and 80mL deionized water were mixed under ultrasonic conditions for 30min to obtain Ti 3 C 2 MXene dispersion with 0.5mmol NiCl 2 ·6H 2 O and 0.4 g of hexamethylenetetramine were mixed for 30 min under stirring, then transferred to a hydrothermal reaction kettle, carried out a hydrothermal reaction at a temperature of 150° C. for 3 h, cooled to room temperature, followed by centrifugation and drying. Get Nickel Hydroxide and Ti 3 C 2 Composite materials of MXene;

[0064] The 0.1g nickel hydroxide and Ti 3 C 2 The composite material of MXene, 0.01g amidinothiourea and 60mL deionized water were mixed under stirring conditions for 30min and then dried. After the dried sample was ground for 5min, it was transferred to a tube furnace. The heating rate of ℃ / min was raised to 350 ℃, and after 1.5h of heat preservation, it was cooled to room temperature with the furnace, and the battery negative electrode material (Ti 3 C 2 MXene and ...

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Abstract

The invention relates to the technical field of electrode materials, in particular to a battery negative electrode material and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing MXene, nickel salt, weak base and water, and performing hydrothermal reaction to obtain a composite material of nickel hydroxide and MXene;and mixing the nickel hydroxide and MXene composite material with amidinothiourea, and carrying out heat treatment to obtain the battery negative electrode material. The preparation method disclosedby the invention is simple in process, safe to operate and low in cost. Meanwhile, according to the record of the embodiment, the battery negative electrode material prepared by the preparation methoddisclosed by the invention has relatively high first-time specific discharge capacity and relatively good cycling stability and rate capability.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a battery negative electrode material and its preparation method and application. Background technique [0002] Energy consumption and environmental pollution are two major problems facing human beings in today's society. In the past ten years, the total amount of disposable energy consumption in China has been on the rise. At the same time, the consumption of these energy sources has brought a series of environmental pollution and ecological problems. . Therefore, it is very important to develop sustainable and clean new energy sources, such as solar energy, wind energy, and tidal energy. This is despite the impressive growth and development of renewable energy over the past 10 years. However, these performance energy sources are unevenly distributed, low in conversion efficiency, unstable in direct supply, and limited by time and space, making it difficult to prom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/136H01M4/1391H01M4/36H01M4/52H01M4/58H01M4/02H01M10/054
CPCH01M4/0471H01M4/136H01M4/1391H01M4/366H01M4/58H01M4/523H01M10/054H01M2004/027Y02E60/10
Inventor 张新宇李晨阳秦家千刘日平
Owner YANSHAN UNIV
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