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Mg2+–W6+ co-doped Li2ZnTi3O8 anode with outstanding room, high and low temperature electrochemical performance for lithium-ion batteries

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Abstract

Li2ZnTi3O8 (LZTO) co-doped with Mg2+–W6+ (LM6ZTW3O) has been successfully prepared by a facile one-step solid-state route. A co-doping strategy improves ionic conductivity, reduces transfer resistance, internal resistance and polarization, stabilizes the structure of LZTO and enables the LM6ZTW3O electrode to have a good electrical contact. The co-doped LZTO exhibits excellent electrochemical performance at room, high and low temperatures. At 1 A g−1, 94.7% of the capacity for the 2nd cycle is kept at room temperature after 400 cycles. At 2 A g−1, there is no capacity decay at the 300th cycle at room temperature. Even at 3 A g−1, 177.9 mA h g−1 is kept at the 120th cycle. At 55 °C, 88.3% of the capacity for the 2nd cycle is obtained at 1 A g−1. At 0 °C, 192.9 mA h g−1 is still obtained at 0.6 A g−1 for the 60th cycle, and there is no capacity decay for 200 and 300 cycles at 0.2 and 0.5 A g−1, respectively.

Graphical abstract: Mg2+–W6+ co-doped Li2ZnTi3O8 anode with outstanding room, high and low temperature electrochemical performance for lithium-ion batteries

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Publication details

The article was received on 10 Aug 2019, accepted on 26 Sep 2019 and first published on 26 Sep 2019


Article type: Research Article
DOI: 10.1039/C9QI01008D
Inorg. Chem. Front., 2019, Advance Article

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    Mg2+–W6+ co-doped Li2ZnTi3O8 anode with outstanding room, high and low temperature electrochemical performance for lithium-ion batteries

    Z. Shen, Z. Zhang, S. Wang, Z. Liu, L. Wang, Y. Bi and Z. Meng, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI01008D

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