Energy Storage Science and Technology ›› 2023, Vol. 12 ›› Issue (11): 3330-3339.doi: 10.19799/j.cnki.2095-4239.2023.0412

• Energy Storage Materials and Devices • Previous Articles     Next Articles

Zinc-nickel battery based on a 3D conductive film and its application in intelligent lock

Song XU1,2(), Mingyu WANG2,3, Liangsheng LI2,3, Liangdong ZHAO2,3, Zihui SUN1, Conghui ZHANG1, Zihan WANG1   

  1. 1.Zhengzhou University of Aeronautics, Zhengzhou 450046, Henan, China
    2.Henan Chaoli New Energy Co. , Ltd. , Xinxiang 453002, Henan, China
    3.Chilwee Power Group Co. , Ltd. , Changxing 313100, Zhejiang, China
  • Received:2023-06-12 Revised:2023-08-15 Online:2023-11-05 Published:2023-11-16
  • Contact: Song XU E-mail:songxu@zua.edu.cn

Abstract:

Zinc-nickel battery (ZNB) is regarded as a prospective green-energy storage technology. However, the large-scale application of ZNB is impeded by the deformation, dendrite growth, passivation, and serious side reactions of the zinc anode. In this study, reduced graphene oxide (rGO), Ketjenblack (KB), and carbon conductive film (CCF) are used to prepare the CCF@KB-rGO film with three-dimensional (3D) conductive network based on the spraying technology. The results show good electrochemical performance by AA ZNBs with CCF@KB-rGO. The hyperbranched KB and layered rGO form a 3D conductive network to enhance electron and ion conduction, thus improving the fast charge and low temperature-discharge performance of ZNB. Furthermore, an 80% capacity charge could be achieved within 43 min, and more than 60% rated capacity is output at 0.5 C at -20 ℃. The layered rGO enables zinc to be deposited uniformly and improves the cycle stability of the zinc anode; no obvious dendrites are found in the zinc anode after 300 cycles. The KB and rGO with high specific-surface area in CCF@KB-rGO can adsorb part of the free electrolytes, thus inhibiting the dissolution of the zinc anode and reducing the self-discharge of the battery. The outstanding electrochemical performance and safety of the AA ZNB with CCF@KB-rGO is far better than that of a disposable dry battery in the application of intelligent locks. Thus, the ever-growing requirements of smart lock are met for battery performance. The design based on the proposed 3D conductive film improves the performance of ZNB effectively, thus providing a new idea for the research of ZNBs.

Key words: zinc-nickel battery, intelligent lock, zinc anode, 3D conductive film, safety

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