Nano-Micro Letters ›› 2024, Vol. 16 ›› Issue (1): 109-. doi: 10.1007/s40820-024-01334-3

• ARTICLE • Previous Articles     Next Articles

Discovering Cathodic Biocompatibility for Aqueous Zn-MnO2 Battery: An Integrating Biomass Carbon Strategy

Wei Lv1(), Zilei Shen1, Xudong Li1, Jingwen Meng1, Weijie Yang2, Fang Ding3(), Xing Ju1, Feng Ye1, Yiming Li4, Xuefeng Lyu1, Miaomiao Wang1, Yonglan Tian1, Chao Xu1()   

  1. 1 Institute of Energy Power Innovation, North China Electric Power University, Beijing, 102206, People’s Republic of China
    2 Department of Power Engineering, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Baoding, 071003, People’s Republic of China
    3 Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, People’s Republic of China
    4 Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou, 014010, People’s Republic of China
  • Received:2023-10-10 Accepted:2023-12-11 Online:2024-01-01 Published:2024-02-05
  • Contact: Wei Lv, Fang Ding, Chao Xu

Abstract:

Developing high-performance aqueous Zn-ion batteries from sustainable biomass becomes increasingly vital for large-scale energy storage in the foreseeable future. Therefore, γ-MnO2 uniformly loaded on N-doped carbon derived from grapefruit peel is successfully fabricated in this work, and particularly the composite cathode with carbon carrier quality percentage of 20 wt% delivers the specific capacity of 391.2 mAh g−1 at 0.1 A g−1, outstanding cyclic stability of 92.17% after 3000 cycles at 5 A g−1, and remarkable energy density of 553.12 Wh kg−1 together with superior coulombic efficiency of ~ 100%. Additionally, the cathodic biosafety is further explored specifically through in vitro cell toxicity experiments, which verifies its tremendous potential in the application of clinical medicine. Besides, Zinc ion energy storage mechanism of the cathode is mainly discussed from the aspects of Jahn-Teller effect and Mn domains distribution combined with theoretical analysis and experimental data. Thus, a novel perspective of the conversion from biomass waste to biocompatible Mn-based cathode is successfully developed.

Key words: Aqueous Zn-ion batteries, Biocompatibility, Jahn-Teller effect, Mn domains, γ-MnO2