Dendrite-Free Li Metal Plating/Stripping Onto Three-Dimensional Vertical-Graphene@Carbon-Cloth Host
Dendrite-Free Li Metal Plating/Stripping Onto Three-Dimensional Vertical-Graphene@Carbon-Cloth Host
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三维垂直石墨烯@碳布主体上的无枝晶锂金属电镀/剥离
DOI：
10.3389/fchem.2019.00714
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发表时间：
2019-10
影响因子：
5.5
通讯作者：
Wang Ye
中科院分区：
文献类型：
--
作者：
Yan Congcong;Xu Tingting;Ma Caiyun;Zang Jinhao;Xu Junmin;Shi Yumeng;Kong Dezhi;Ke Chang;Li Xinjian;Wang Ye
金属锂具有较高的比容量和较低的氧化还原电位，被认为是新一代锂离子电池的理想负极材料。然而，电化学沉积过程中锂枝晶的形成不受控制，导致库仑效率低，安全问题严重，阻碍了金属锂阳极的实际应用。抑制锂树枝晶问题的一个很有前途的策略是使用具有良好导电性和大比表面积的三维主体。本文采用在合成的碳布(VG/CC)上生长的垂直石墨烯纳米片作为锂沉积基质。具有较大比表面积的三维VG/CC可以提供丰富的活性形核中心，有效地降低电流密度，导致均匀的Li沉积，从而克服了枝晶问题。Li@VG/CC负极在长循环后表现出无枝晶的形貌，其电化学性能优于平面铜集电体。在10 mA cm−2的大电流密度下，电池的电压滞后值为90.9 mV，在2 mA cm−2下循环100次，库仑效率达到99%。
Lithium metal is deemed as an ideal anode material for next-generation lithium ion batteries (LIBs) due to its high specific capacity and low redox potential. However, uncontrolled lithium dendrite formation during electrochemical deposition leads to a low Coulombic efficiency and serious safety issues, dragging metallic lithium anodes out of practical application. One promising strategy to suppress lithium dendrite issues is employing a three-dimensional host with admirable conductivity and large surface area. Herein, a vertical graphene nanosheet grown on carbon cloth (VG/CC) synthesized is adopted as the Li deposition host. The three-dimensional VG/CC with a large surface area can provide abundant active nucleation sites and effectively reduce the current density, leading to homogeneous Li deposition to overcome the dendrite issue. The Li@VG/CC anode exhibits a dendrite-free morphology after a long cycle and superior electrochemical performance to that of planar Cu current collector. It delivers a small voltage hysteresis of 90.9 mV at a high current density of 10 mA cm−2 and a Coulombic efficiency of 99% over 100 cycles at 2 mA cm−2. Our results indicate that this all-carbon-based nanostructure host has great potential for next-generation Li metal batteries.
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影响因子：
9.2
作者：
Kolosnitsyn, V. S.;Kuzmina, E. V.;Mochalov, S. E.
通讯作者：
Mochalov, S. E.
影响因子：
13.3
作者：
R. Tian;H. Duan;Yiping Guo;Hua Li;Hezhou Liu
通讯作者：
R. Tian;H. Duan;Yiping Guo;Hua Li;Hezhou Liu
用于混合超级电容器的具有高度增强性能的 3D 介孔 Ni(OH)(2)/WS2 纳米纤维
影响因子：
3.8
作者：
Jiang Zimin;Xu Tingting;Dai Shuge;Yan Congcong;Ma Caiyun;Wang Xinchang;Xu Junmin;Zhang Sen;Wang Ye
通讯作者：
Wang Ye
影响因子：
9.2
作者：
Y. Zhang;Sufu Liu;X. Wang;Y. Zhong;X. Xia;J. Wu;J. Tu
通讯作者：
Y. Zhang;Sufu Liu;X. Wang;Y. Zhong;X. Xia;J. Wu;J. Tu
影响因子：
9.9
作者：
Ying Zhang;Boyang Liu;Emily Hitz;W. Luo;Yonggang Yao;Yiju Li;J. Dai;Chaoji Chen;Yanbin Wang-Yanbin
通讯作者：
Ying Zhang;Boyang Liu;Emily Hitz;W. Luo;Yonggang Yao;Yiju Li;J. Dai;Chaoji Chen;Yanbin Wang-Yanbin