Encapsulating Metallic Lithium into Carbon Nanocages Which Enables a Low-Volume Effect and a Dendrite-Free Lithium Metal Anode

ACS Applied Materials & Interfaces
Hailin FanYanqing Lai

Abstract

Metallic lithium (Li), with its high capacity and low redox potential, shows significant development potential for high-energy-density Li batteries. Unfortunately, huge volumetric changes, uncontrollable Li dendrites, and interfacial parasitic reactions limit its commercial application. Herein, we demonstrate a rational strategy of encapsulating metallic Li into the interior spaces of hollow carbon (C) nanocages for dendrite-free Li metal anodes. We find that the poly(vinylidene difluoride)-binder-modified thin-layer C walls on the C nanocages can guide Li deposition into the interior spaces of these hollow C nanocages and simultaneously reduce the interfacial parasitic reactions between deposited Li metal and an electrolyte. In addition, because of the high specific surface area and huge interior spaces of the C nanocages, the local current density can be reduced and large volume changes are mitigated. Specifically, this electrode exhibits negligible volume changes at 1.0 mAh/cm2 and a 14.9% volume change at 3.0 mAh/cm2. The copper (Cu) foil electrode exhibits 87.9% and 234.3% volume changes at the corresponding deposition capacities. Consequently, a C-nanocage-modified electrode exhibits an outstanding Coulombic efficiency of...Continue Reading

References

Jul 30, 2014·Nature Nanotechnology·Guangyuan ZhengYi Cui
Nov 20, 2014·Chemical Communications : Chem Comm·Ding ZhangShoushan Fan
Nov 25, 2014·Nano Letters·Yaohui ZhangJi-Guang Zhang
Feb 24, 2015·Nature Communications·Jiangfeng QianJi-Guang Zhang
May 25, 2016·Advanced Materials·Qinbai YunQuan-Hong Yang
Nov 3, 2016·ACS Applied Materials & Interfaces·Ling-Long KongXue-Ping Gao
Mar 8, 2017·Nature Nanotechnology·Dingchang LinYi Cui
Mar 24, 2017·Advanced Science·Rui ZhangYu-Guo Guo
Jul 29, 2017·Chemical Reviews·Xin-Bing ChengQiang Zhang
Dec 13, 2017·Journal of the American Chemical Society·Hui DuanLi-Jun Wan

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