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8 results on '"Xu, Huishi"'

5. Facilely Fabricating F-Doped Fe 3 N Nanoellipsoids Grown on 3D N-Doped Porous Carbon Framework as a Preeminent Negative Material.

Author

Zhang, Dan, Zhang, Chunyan, Xu, Huishi, Huo, Zhe, Shi, Xinyu, Liu, Xiaodi, Liu, Guangyin, and Yu, Chuang

Subjects
TRANSITION metal oxides, TRANSITION metal nitrides, DOPING agents (Chemistry), NEGATIVE electrode, LITHIUM ions, COMPOSITE materials
Abstract

Transition metal nitride negative electrode materials with a high capacity and electronic conduction are still troubled by the large volume change in the discharging procedure and the low lithium ion diffusion rate. Synthesizing the composite material of F-doped Fe3N and an N-doped porous carbon framework will overcome the foregoing troubles and effectuate a preeminent electrochemical performance. In this study, we created a simple route to obtain the composite of F-doped Fe3N nanoellipsoids and a 3D N-doped porous carbon framework under non-ammonia atmosphere conditions. Integrating the F-doped Fe3N nanoellipsoids with an N-doped porous carbon framework can immensely repress the problem of volume expansion but also substantially elevate the lithium ion diffusion rate. When utilized as a negative electrode for lithium-ion batteries, this composite bespeaks a stellar operational life and rate capability, releasing a tempting capacity of 574 mAh g–1 after 550 cycles at 1.0 A g–1. The results of this study will profoundly promote the evolution and application of transition metal nitrides in batteries. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Facile Synthesis of Ultrasmall SnO2/Sn Nanoparticles Grown on the N-Doped Carbon Framework as a Long-Life Anode Material

Author

Zhang, Dan, Zhang, Chunyan, Zhao, Yizhuo, Zheng, Xuan, Shi, Xinyu, Xu, Huishi, Cheng, Zhiguo, Li, Yuzhu, Liu, Guangyin, Liu, Xiaodi, and Yu, Chuang

Abstract

The development of SnO2-based negative materials possessing a long cyclic life is troubled by their huge volume change in the Li+insertion and detachment process. In our study, the SnO2/Sn/NC composite was successfully prepared by an uncomplicated and controllable route. The ultrasmall SnO2/Sn nanoparticles are fixed on the N-doped carbon framework, which prominently alleviate its vast volume variation and improve its electrochemical reaction kinetics. The above-mentioned feature of SnO2/Sn/NC endows it with an exceptional cyclic lifespan and good rate capability. When employed as the negative electrode for the Li-ion battery at 1.0 A g–1, it releases a competent discharge capacity of 344 mAh g–1at the 995th cycle. New dawn would be brought by the investigation of the synthesis and utilization of Sn-based compounds.

Published
2023
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