Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (10): 20220257.doi: 10.7503/cjcu20220257

• Physical Chemistry • Previous Articles     Next Articles

Preparation of Nano-copper Modified Three-dimensional Zinc Mesh Electrode and Its Performance as Anode for Zinc-ion Batteries

JIANG Baozheng1,2, HUANG Wenting2, LIU Wenbao2, GUO Rongsheng2, XU Chengjun2(), KANG Feiyu1,2()   

  1. 1.Tsinghua?Berkeley Shenzhen Institute
    2.Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China
  • Received:2022-04-17 Online:2022-10-10 Published:2022-06-09
  • Contact: XU Chengjun,KANG Feiyu E-mail:zincgroup@126.com;fykang@tsinghua.edu.cn
  • Supported by:
    the Shenzhen Technical Plan Project, China(JCYJ20160301154114273)

Abstract:

Nano-copper modified three-dimensional zinc mesh(nano Cu@3D Zn mesh, denoted as 3D Cu-Zn) electrode was designed and fabricated. The 3D Cu-Zn electrode was adopted as the host material of Zn deposition in zinc ion batteries. Stable Zn anode with long cycle life was achieved. The 3D Cu-Zn electrode with 3D zinc mesh skeleton and uniformly distributed Cu nanoparticles with 3D dendritic morphology can reduce the local current density and provide structural support and accommodation space for Zn deposition. In addition, the copper with strong zinc binding ability on the surface of the zinc mesh and subsequent in situ formed Cu-Zn alloy can effectively reduce the nucleation overpotential and act as uniformly distributed nucleation sites to guide the uniform nucleation and deposition of zinc. The 3D Cu-Zn electrode exhibits low nucleation overpotential and interfacial impedance, and shows excellent cycling stability(over 1100 h lifespan) in symmetric cells at a current density of 0.5 mA/cm2. When combined with MnO2 cathode, the full cell with 3D Cu-Zn electrode exhibits smaller polarization, superior rate performance and excellent cycling performance.

Key words: Zinc-ion battery, Zinc metal anode, Three-dimensional current collector, Zincophilic site, Copper-zinc alloy

CLC Number: 

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