GeP_5/C:一种大容量、高首次库仑效率的新型钠离子电池用负极材料
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- 英文论文题名：GeP_5/C:a promising anode material candidate wih large capacity and high initial Coulombic Efficiency for sodium ion batteries
- 论文作者：李文武 ; 柯霖波 ; 韦雅庆 ; 李会巧
- 英文论文作者：Wenwu Li ; Linbo Ke ; Yaqing Wei ; Huiqiao Li ; School of Materials Science and Engineering ; Huazhong University of Science and Technology(HUST)
- 年：2016
- 作者机构：华中科技大学材料科学与工程学院;
- 论文关键词：五磷化锗 ; 钠离子电池 ; 负极材料 ; 大容量 ; 高首效
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十分会：化学电源
- 语种：中文
- 分类号：TB332;TM912
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：215k
- 原文格式：D
- 会议级别：全国
摘要
具有层状结构的GeP_5与碳材料进行复合后,表现了高度可逆的储钠性能:在电流密度为100 mAg~(-1),给出高达1250 mAh g~(-1)的比容量,首次库伦效率高于90%。并且光滑的充放电曲线具有较低且安全的电位,适合用作钠离子电池负极材料。GeP_5/C复合材料也表现出超高的倍率性能,在电流密度高达1.5 Ag~(-1)下,仍然具有高达900 mA h g~(-1)的可逆比容量进行复合正文。进一步将该负极材料与Na_3V_2(PO_4)_3@C组装成全电池,该全电池也表现了优异的电化学性能,具有高达ca.800 mAh g~(-1)的可逆比容量,同时输出电压高达2.65 V,具有一定的应用前景。
When applied as anode materials for sodium ion batteries(SIBs),GeP_5/C anodes deliver a highly reversible sodium storage capacity of 1250 mA h g~(-1) with the initial C.E.up to 93%at a current density of 100 mA g~(-1).And,the discharge/charge curves of the GeP_5/C anodes represents high smoothness with a low average redox potential of ca.0.4 V vs.Na~+/Na.Besides,the GeP_5/C anode also represents an excellent rate performance of 900 mA h g~(-1) even at a current rate of 1.5 A g~(-1),along with 60 cycles without capacity decay.When coupling with Na_3V_2(PO_4)_3/C cathode,the assembled full cells show a large reversible capacity of ca.800 m A h g~(-1) with a high average output voltage of ca.2.65 V.Based on these excellent sodium storage performances,GeP_5/C would be a promising anode material candidate for SIBs.
When applied as anode materials for sodium ion batteries(SIBs),GeP_5/C anodes deliver a highly reversible sodium storage capacity of 1250 mA h g~(-1) with the initial C.E.up to 93%at a current density of 100 mA g~(-1).And,the discharge/charge curves of the GeP_5/C anodes represents high smoothness with a low average redox potential of ca.0.4 V vs.Na~+/Na.Besides,the GeP_5/C anode also represents an excellent rate performance of 900 mA h g~(-1) even at a current rate of 1.5 A g~(-1),along with 60 cycles without capacity decay.When coupling with Na_3V_2(PO_4)_3/C cathode,the assembled full cells show a large reversible capacity of ca.800 m A h g~(-1) with a high average output voltage of ca.2.65 V.Based on these excellent sodium storage performances,GeP_5/C would be a promising anode material candidate for SIBs.
引文
[1]Li W.;Li H.;Lu Z.;Gan L.;Ke L.;Zhai T.;Zhou H.Energy&Environmental Science,2015,8(12):3629-3636.