Original Research ARTICLE
Dendrite-free Li metal plating/stripping onto three-dimensional vertical-graphene@carbon-cloth host
- 1Zhengzhou University, China
- 2Shenzhen University, China
- 3Nanyang Technological University, Singapore
Lithium metal is deemed as an ideal anode material for next generation lithium ion batteries (LIBs) due to its high specific capacity and lowest 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 of promising strategies 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 dendrite issue. The Li@VG/CC anode exhibits a dendrite-free morphology after long cycle and superior electrochemical performance than 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, a Coulombic efficiency of 99% over 100 cycles at 2 mA·cm-2. Our results indicate that this all carbon based nanostructure host has a great potential for next generation Li metal batteries.
Keywords: Li metal anode, three-dimensional VG/CC, dendrite-free, excellent electrochemical performance, Long cycle stability
Received: 07 Jul 2019;
Accepted: 09 Oct 2019.
Copyright: © 2019 Yan, Xu, Ma, Zang, Xu, Shi, Ke, Li and Wang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Dr. Ye Wang, Zhengzhou University, Zhengzhou, 450001, Henan Province, China, firstname.lastname@example.org