Journal
ADVANCED MATERIALS INTERFACES
Volume 9, Issue 26, Pages -Publisher
WILEY
DOI: 10.1002/admi.202201230
Keywords
Co; O-3; (4); CoS; (2); heterostructures; interfacial ion transport; lithium-ion batteries; one-step sulfuration
Funding
- National Natural Science Foundation of China [51703241]
- Postdoctoral Foundation of China [2017M621855]
- Anhui Provincial Natural Science Foundation [1908085QE244]
- Anhui Provincial Postdoctoral Science Foundation [2019B345]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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This article presents a method of growing layered polyhedral cobalt oxide and cobalt disulphide heterostructures on carbon cloth as an anode material for lithium-ion batteries. The heterostructures effectively enhance charge transfer capability and increase the electrical conductivity of the material, leading to high capacity and outstanding cycling life.
The increasing demands of electric vehicles and portable electronics have stimulated enhanced investigations on lithium-ion batteries (LIBs) with high capacity, increased rate capability, and long cycle stability. Transition metal oxides (TMOs) are regarded as the most promising anode materials for LIBs due to their higher theoretical capacity. However, the low conductivity and poor rate-capability of the TMOs have seriously restricted their further development in the LIBs. Herein, layered polyhedral cobalt oxide (Co3O4)/cobalt disulifde (CoS2) with heterostructure is directly grown on carbon cloth (CC) via a facile hydrothermal method and one-step sulfuration process for use as an anode. The heterostructures can effectively enhance the charge transfer capability due to the interfacial effect between Co3O4 and CoS2. Due to the decrease of the diffusion barrier on the nanocrystalline surface, the electrical conductivity of the material is significantly increased, the ionic diffusion resistance is significantly reduced, and the interface electron transfer increases. The Co3O4/CoS2//CC can deliver a high capacity (1545.8 mAh g(-1) at 2 A g(-1)) and outstanding cycling life (493 mAh g(-1) after 300 cycles). This method provides a new idea and choice for the application of heterogeneous anode materials for LIBs.
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