V2O5 self-assembled nanosheets as high stable cathodes for Lithium-ion batteries. (10th February 2016)

• Record Type: Journal Article
• Authors: Huang, Jianfeng; Qiao, Xiaoning; Xu, Zhanwei; Cao, Liyun; Ouyang, Haibo; Li, Jiayin; Wang, Ruiyi
• Is Part Of: Electrochimica acta. Volume 191(2016)
• Page Start: 158
• Page End: 164
• Publication Date: 2016-02-10
• Subjects: V2O5 -- Thermal decomposition -- Nanocrystalline materials -- Electrochemical performance -- Lithium-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.01.073
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The V2 O5 self-assembled nanosheets (SANs V2 O5 ) were synthesized by an additive-free ultrasonic method with subsequent thermal decomposition. The loose nanostructured V2 O5 is multi-layer structure stacked by 4∼6 layers with a thickness of 200∼300 nm and each layer is composed by abundant nanoparticles in order. Due to this unique layered structure, the SANs V2 O5 exhibits remarkable rate performance and excellent cycling stability. Specifically, it delivers reversible discharge capacities of 157.2 and 111.6 mAh g −1 at current densities of 2C and 5C. After 300 cycles, it still maintained high capacities of 123.5 and 85.1 mAh g −1, which corresponds to a capacity loss of 0.07% and 0.08% per cycle, respectively. In addition, even at 10C, it displays a capacity of 68.8 mAh g −1 and 87.9% of the capacity (60.5 mAh g −1 ) is remained after 300 cycles. All the results indicate the V2 O5 self-assembled nanosheets could be a promising candidate as cathode active material for long-term cycling performance in Lithium-ion batteries.