ZnIn2S4 sodium ion battery negative electrode material and preparation method thereof

A sodium ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems that electrochemically active metals have not been studied, and achieve enhanced electrochemical kinetics performance and improved electrical conductivity Sex, the effect of improving the mobility

Active Publication Date: 2021-06-15
HENAN UNIVERSITY
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  • Application Information

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Problems solved by technology

[0004] The applicant has incorporated electrochemically active metals into copper-based sulfides to construct a new structure, which can be used as a buffer medium introduced in situ to stabilize the structure of copper-based sulfides in the process of repeated sodium ion deintercalation, and then Make copper-based sulfides have excellent electrochemical properties, but because zinc in zinc-based sulfides is an active metal, whether it can be combined with electrochemically active metals has not been studied

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  • ZnIn2S4 sodium ion battery negative electrode material and preparation method thereof
  • ZnIn2S4 sodium ion battery negative electrode material and preparation method thereof
  • ZnIn2S4 sodium ion battery negative electrode material and preparation method thereof

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Embodiment

[0029] A ZnIn 2 S 4 The negative electrode material of sodium ion battery comprises the following steps: comprising the following steps:

[0030] 1) Evenly disperse 1mmol of zinc chloride, 2mmol of indium chloride tetrahydrate, and 6mmol of thioacetamide in 37.5mL of deionized water;

[0031] 2) Transfer the precursor solution obtained in step 1 to a 50mL polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at 180°C for 24 hours under the protection of an inert gas;

[0032] 3) The solution obtained in step 2 was centrifuged to obtain a precipitate, which was washed several times with deionized water and then freeze-dried for 4 hours.

[0033] 4) Anneal the powder obtained in step 3 at 500°C for 2 hours in an Ar atmosphere to obtain ZnIn with a micron flower ball structure 2 S 4 .

[0034] Specifically, under the protection of an inert gas, the following operations are carried out, the precursor solution obtained in step 1) is transferred to a 50mL polytet...

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Abstract

The invention provides a ZnIn2S4 sodium-ion battery negative electrode material and a preparation method thereof. Specifically, a precursor solution is transferred into a 50 mL polytetrafluoroethylene reaction kettle, the reaction kettle is placed in a container filled with inert gas, the inert gas is introduced into the precursor solution for 10-30 min to drive dissolved oxygen in the precursor solution, the influence of oxygen on Zn is avoided, and large-scale ZnIn2S4 particles with good crystallinity and a uniform microflower spherical microstructure are obtained.

Description

technical field [0001] The invention relates to a negative electrode material for a sodium ion battery and a preparation method thereof, in particular to a ZnIn 2 S 4 Sodium ion battery negative electrode material and preparation method thereof. Background technique [0002] Among numerous anode materials for sodium-ion batteries (SIBs), zinc sulfide (ZnS) is an attractive anode material with an operating voltage of less than 1 V (relative to Na / Na + ), the theoretical specific capacity is 575mAh g -1 , the dominant reaction mechanism for deintercalating sodium ions is transformation / alloying. However, ZnS as an anode material for SIBs batteries suffers from poor long-term cycle stability and low capacity retention due to poor internal ionic conductivity and slow sodium ion diffusion kinetics. The applicant has incorporated electrochemically active metals into copper-based sulfides to construct a new structure, which can be used as a buffer medium introduced in situ to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00H01M4/58H01M10/054
CPCC01G15/006H01M4/5815H01M10/054C01P2002/72C01P2004/03C01P2004/61Y02E60/10
Inventor 闫冬郁彩艳白莹陈素华李世玉尹延锋赵慧玲
Owner HENAN UNIVERSITY
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