V(2)O(5) Nanospheres with Mixed Vanadium Valences as High Electrochemically Active Aqueous Zinc-Ion Battery Cathode.
V(2)O(5) Nanospheres with Mixed Vanadium Valences as High Electrochemically Active Aqueous Zinc-Ion Battery Cathode.
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混合钒价 V2O5 纳米球作为高电化学活性水系锌离子电池正极
DOI:
10.1007/s40820-019-0256-2
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发表时间:
2019-03-22
影响因子:
26.6
通讯作者:
Liang S
中科院分区:
文献类型:
--
作者:
Liu F;Chen Z;Fang G;Wang Z;Cai Y;Tang B;Zhou J;Liang S
A V4+-V2O5 cathode with mixed vanadium valences was prepared via a novel synthetic method using VOOH as the precursor, and its zinc-ion storage performance was evaluated. The products are hollow spheres consisting of nanoflakes. The V4+-V2O5 cathode exhibits a prominent cycling performance, with a specific capacity of 140 mAh g−1 after 1000 cycles at 10 A g−1, and an excellent rate capability. The good electrochemical performance is attributed to the presence of V4+, which leads to higher electrochemical activity, lower polarization, faster ion diffusion, and higher electrical conductivity than V2O5 without V4+. This engineering strategy of valence state manipulation may pave the way for designing high-performance cathodes for elucidating advanced battery chemistry.
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