New insights into the Li-storage mechanism in α-Ga2O3 anode and the optimized electrode design
New insights into the Li-storage mechanism in α-Ga2O3 anode and the optimized electrode design
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对α-Ga2O3负极储锂机制的新见解及优化的电极设计
DOI:
10.1016/j.jpowsour.2019.05.087
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发表时间:
2019-09
影响因子:
9.2
通讯作者:
Jinbao Zhao
中科院分区:
文献类型:
--
作者:
Shibing Ni;Qichang Chen;Jilei Liu;Shuyue Yang;Tao Li;Xuelin Yang;Jinbao Zhao
Fundamental insights into Li storage mechanism in α-Ga2O3allow manipulating materials with improved electrochemical performance. Here, conversion reactions coupled with alloying/dealloying process are uncovered for Li storage in α-Ga2O3anode, on the basis ofex-situXRD, XPS, SAED and EDS mapping results. Specifically, both processes are part of irreversible. α-Ga2O3decorated with amorphous carbon and graphene (α-Ga2O3@C@G) and nitrogen doping are successfully fabricated via a facile approach, showing distinctly improved performance compared with pristine α-Ga2O3and α-Ga2O3decorated with graphene (α-Ga2O3@G). In the Ga2O3@C@G, dual carbon improves the electronic conductivity and facilitates electrochemical reconstruction of the Ga2O3@C@G upon cycling that renders high lithium ion diffusion, giving rise to enhanced capacitive contribution for lithium storage. As a result, the Ga2O3@C@G exhibits high discharge/charge capacity of 458/447.3 mAh g−1after 50 cycles at 0.1 A g−1, with capacitive contribution of 59.2% for lithium ion storage at a scan rate of 1 mV s−1.
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影响因子:
9.2
作者:
Chen, Zerui;Zhang, Yu;Shi, Bi
通讯作者:
Shi, Bi
影响因子:
15
作者:
HUMMERS, WS;OFFEMAN, RE
通讯作者:
OFFEMAN, RE
影响因子:
3.1
作者:
Zatsepin, D. A.;Boukhvalov, D. W.;Esin, A. A.
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影响因子:
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影响因子:
9.2
作者:
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通讯作者:
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