A kind of antimony trisulfide nano-dot/sulfur-doped carbon composite material and its preparation method and application in sodium/potassium ion battery

A carbon composite material and nano-dot technology, which is applied in the preparation/purification of carbon, antimony sulfide, secondary batteries, etc., can solve the problems of volume expansion, insufficient material cycle stability, large volume expansion, etc., to improve conductivity, Improve the electrochemical performance, inhibit the conversion reaction and the effect of
CN110729478BActive Publication Date: 2021-08-17CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2021-08-17

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Abstract

The invention discloses an antimony trisulfide nano-dot / sulfur-doped carbon composite material, a preparation method thereof and an application in a sodium / potassium ion battery. Composites made of Sb 2 S 3 The nano-dots are uniformly distributed in the pores and surfaces of sulfur-doped carbon. The preparation method is to place the organic antimony salt in a reducing atmosphere for reduction treatment to obtain antimony nano-dots / carbon composite materials, antimony nano-dots / carbon composite materials and The sulfur source is placed under a protective atmosphere for solid-state reaction to obtain. The Sb of the composite 2 S 3 It is a nano-dot material with unique volume effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, etc., which can effectively improve the electrochemical performance of the composite material, and the sulfur-doped carbon carrier can improve the conductivity of the composite material, and at the same time It can alleviate the large volume expansion of antimony trisulfide material during charging and discharging, and it is used in sodium-ion and potassium-ion batteries to show high capacity and good cycle stability.
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Description

technical field

[0001] The invention relates to a negative electrode material for a sodium / potassium ion battery, in particular to a Sb 2 S 3 The nano-dot / sulfur-doped carbon composite material also relates to its preparation method and its application as a negative electrode material for sodium-ion or potassium-ion batteries, belonging to the fields of new energy storage materials and electrochemistry. Background technique

[0002] The need for green energy conversion and storage in various applications such as portable electronic devices, electric vehicles, and large-scale power stations drives the exploration of advanced energy storage technologies. A variety of energy storage devices have been designed and studied for different energy storage requirements. Among them, lithium-ion batteries have penetrated into many aspects of daily life since their commercialization in the 1990s due to their advantages such as high specific capacity, long cycle life, high working volta...

Claims

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