Uniform and continuous carbon coated sodium vanadium phosphate cathode materials for sodium-ion battery
Uniform and continuous carbon coated sodium vanadium phosphate cathode materials for sodium-ion battery
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钠离子电池用均匀连续碳包覆磷酸钒钠正极材料
DOI:
10.1016/j.jpowsour.2014.09.046
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发表时间:
2014-12
期刊:
影响因子:
--
通讯作者:
Yitai Qian
中科院分区:
文献类型:
--
作者:
Lulu Si;Zhengqiu Yuan;Lei Hu;Yongchun Zhu;Yitai Qian
Sodium vanadium phosphate Na3V2(PO4)3coated with uniform and continuous carbon film is synthesized by heat treatment of the precursors under C2H2-pyrolysis reducing atmosphere, in which Na3V2(PO4)3is formed synchronously with carbon coating. As a cathode material for Na-ion batteries, Na3V2(PO4)3/C shows a flat charge plateau at about 3.39 V in the potential window of 2.5–4.0 V versus Na+/Na. The charge capacity of 83.7 mAh g−1and discharge capacity of 82.1 mAh g−1can be obtained at a current rate of 1C after 300 cycles and the coulombic efficiency averages 98% throughout. The enhanced electrochemical performance can be contributed to the uniform and continuous carbon layer, which greatly improves the electric conductivity of Na3V2(PO4)3.
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影响因子:
41.2
作者:
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通讯作者:
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--
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