Enhanced lithium storage performance of V(2)O(5) with oxygen vacancy.
Enhanced lithium storage performance of V(2)O(5) with oxygen vacancy.
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氧空位增强V2O5的储锂性能
DOI:
10.1039/c8ra07326k
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发表时间:
2018-11-23
期刊:
影响因子:
3.9
通讯作者:
Li, Yanwei
中科院分区:
文献类型:
--
作者:
Sun, Yinlu;Xie, Zhiping;Li, Yanwei
Orthorhombic phase V2O5 nanosheets with a high V4+ content (V-V2O5) have been fabricated via a facile sol–gel method and freeze-drying technology followed with a vacuum annealing process. XPS tests demonstrated that the content of V4+ in the as-prepared V-V2O5 sample was 7.4%, much higher than that (4.7%) in the V2O5 sample annealed in air. Compared with the V2O5 annealed in air, the V-V2O5 sample exhibited better cycling stability, higher lithium storage activity, and smaller electrochemical reaction resistance when evaluated as a cathode active material for lithium ion batteries. For example, the specific capacity of the V-V2O5 and V2O5 electrodes after 100 cycles at 200 mA g−1 are 224.7 and 199.2 mA h g−1, respectively; after 200 cycles at 3 A g−1 are 150 and 136.7 mA h g−1, respectively. Orthorhombic phase V2O5 nanosheets with a high V4+ content (V-V2O5) have been fabricated via a facile sol–gel method and freeze-drying technology followed with a vacuum annealing process.
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影响因子:
1.9
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通讯作者:
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