3D lithiophilic–lithiophobic–lithiophilic dual-gradient porous skeleton for highly stable lithium metal anode

Hongfei Zheng; Qingfei Zhang; Qiulin Chen; Wanjie Xu; Qingshui Xie; Yuxin Cai; Yating Ma; Zhensong Qiao; Qing Luo; Jie Lin; Laisen Wang; Baihua Qu; Baisheng Sa; Dong-Liang Peng

doi:10.1039/C9TA09505E

3D lithiophilic–lithiophobic–lithiophilic dual-gradient porous skeleton for highly stable lithium metal anode†

Hongfei Zheng,^a Qingfei Zhang,^a Qiulin Chen,^a Wanjie Xu,^a Qingshui Xie,

*^a Yuxin Cai,^a Yating Ma,^a Zhensong Qiao,^a Qing Luo,^a Jie Lin,^a Laisen Wang,^a Baihua Qu,^b Baisheng Sa

*^c and Dong-Liang Peng

*^a

Author affiliations

* Corresponding authors

^a Department of Materials Science and Engineering, State Key Lab of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen, China
E-mail: xieqsh@xmu.edu.cn, dlpeng@xmu.edu.cn
Fax: +86-592-2183515
Tel: +86-592-2180155

^b Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, China

^c Multiscale Computational Materials Facility, College of Materials Science and Engineering, Fuzhou University, Fuzhou, China
E-mail: bssa@fzu.edu.cn

Abstract

The lithium metal anode has been considered the most promising anode in rechargeable batteries to meet the ever-increasing requirements of high energy density. Herein, a 3D porous lithiophilic–lithiophobic–lithiophilic dual-gradient Cu–Au–ZnO–PAN–ZnO (CAZPZ) current collector is fabricated to suppress Li dendrite growth. The lithiophilic Au and ZnO at the bottom are favorable for homogeneous Li nucleation, the ZnO–PAN–ZnO skeleton provides plenty of space to accommodate deposited Li and the lithiated ZnO (Li₂O/Li_xZn) layer can act as an artificial SEI to regulate the well-distributed Li⁺ flux. As a result, long-term stabilization for 1200 h at 0.5 mA cm⁻² and a low overpotential of 22 mV at 3 mA cm⁻² are achieved in symmetric cells. Moreover, the CAZPZ–Li hybrid anode exhibits superb electrochemical properties when matched with a LiFePO₄ (LFP) cathode. The CAZPZ–Li‖LFP full cells exhibit excellent stabilization for 1000 cycles at 5C with a high capacity retention of 97.3%. The lithiophilic–lithiophobic–lithiophilic dual-gradient design of the 3D porous current collector for the Li metal anode can be a very promising strategy to enable the practical application of Li metal batteries.

Journal of Materials Chemistry A

3D lithiophilic–lithiophobic–lithiophilic dual-gradient porous skeleton for highly stable lithium metal anode†

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3D lithiophilic–lithiophobic–lithiophilic dual-gradient porous skeleton for highly stable lithium metal anode

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