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NEW JOURNAL OF CHEMISTRY · 2021 ·Vol. 45 ·期 46 ·21888-21895 · IF 3.591

Bismuth metal organic framework-derived Bi2Se3@C for high performance supercapacitors

Hengjie Qin,Ying Lv,Ping Li,Meixia Xiao,Haiyang Song,Qian Zhang,Jialun Yang

A series of Bi2Se3@C materials were prepared through a bismuth metal organic framework (CAU-17) assisted hydrothermal selenization method followed by carbonization, which have been found to be useful as electrode materials for supercapacitor application. The Bi2Se3@C obtained below 500 °C seems to show an excellent specific capacity of 565.9 C g−1 at a current density of 1 A g−1. Furthermore, the performance of Bi2Se3@C in symmetrical supercapacitors (SSCs) is also systemically investigated, and the SSC device achieves a maximum energy density of 39.3 W h kg−1 at a power density of 639.9 W kg−1 and maintains 90.5% of this capacity over 1000 cycles.

CAS / MDL: 64-17-5 10035-06-0 7803-57-8 67-56-1 7782-49-2 554-95-0

研究领域: 材料科学 · 电化学 · 能源存储

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APPLIED SURFACE SCIENCE · 2025 · IF 6.9

Sandwiched Bi2Se3@C nanocomposite designed by solid-state strategy with high lithium storage capacity

Zhihao Xing,Weige Zhang,Jing Xie,Xinhui Liu,Zhenjiang Lu,Jindou Hu,Yali Cao

The Bi 2 Se 3 electrode material with dual storage mechanism has great potential to promote the development of high-capacity lithium-ion batteries. However, the serve selenium loss, large volume expansion and poor conductivity of Bi 2 Se 3 greatly hinder its practical application. To circumvent these issues, a unique Bi 2 Se 3 @C layered nanomaterial with sandwich like architecture was prepared by in situ selenization of precursor that originated from low-temperature solid-state chemical reaction, which provides superior lithium-ion storage capacity due to the advantages of increased interlayer spacing and abundant active sites, as well as the carbon-coated Bi 2 Se 3 nanoparticles inhibit self-aggregation and buffer the expansion of volume. The Bi 2 Se 3 @C-5/1 presents an exceptional capacity of 561.4 mA h g −1 (500 mA g −1 , 300 cycles) and 476 mA h g −1 (3 A g −1 , 500 cycles), as well as outstanding rate capability and durability. The splendid lithium storage property of sandwiched Bi 2 Se 3 @C is anticipated to provide a feasible method for designing and constructing other anode materials.

CAS / MDL: 10035-06-0 554-95-0

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Bismuth metal organic framework-derived Bi2Se3@C for high performance supercapacitors

Sandwiched Bi2Se3@C nanocomposite designed by solid-state strategy with high lithium storage capacity