An Advanced Lithium Ion Battery Based on a Sulfur-Doped Porous Carbon Anode and a Lithium Iron Phosphate Cathode

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• 作者：Yuzhen Sun ; Guoqing Ning ; ^{ngq@cup.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{ninggq@qq.com" class="auth_mail" title="E-mail the corresponding author} ; Chuanlei Qi ; Jiacheng Li ; Xinlong Ma ; Chenggen Xu ; Yongfeng Li ; Xin Zhang ; Jinsen Gao
• 关键词：S doping ; N doping ; Lithium ion battery ; Full cell ; Energy density
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：1 February 2016
• 年：2016
• 卷：190
• 期：Complete
• 页码：141-149
• 全文大小：3012 K

文摘

An S-doped porous carbon (SPC) with a pillar-supported porous layer structure is prepared by carbonizing petroleum asphalt adsorbed on porous MgO-MgSO₄ composite layers. As anode for a half cell, the SPC presents high Li storage capacity and excellent cycling stability (100 cycles without capacity decay), markedly superior to those of the N-doped porous carbon (NPC) and the undoped porous carbon (PC). Coin type full cells with SPC as anode and LiFePO₄ (LFP) as cathode (SPC/LFP) are assembled and tested, which afford a high reversible capability (161 mA h g⁻¹ at 0.2C based on the mass of cathode) with a capacity retention of 96.8% after 100 cycles at 1C, indicating a superior cycling stability as compared to the previously-reported graphene/LFP cells. State-of-charge estimation with satisfying error tolerance is realized in the SPC/LFP full cell. These unique features of SPC suggest a practical substitution of graphite as a high performance anode material in LIBs and broaden roads to hybrid devices with reliable battery management systems.