1. High performance N-doped carbon nanosheet/MnO2 cathode derived from bacterial cellulose for aqueous Zn-ion batteries.
- Author
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Wang, Wenhai, Black, Ashley P., Liu, Cheng, Martin-Diaconescu, Vlad, Simonelli, Laura, and Tonti, Dino
- Abstract
Rechargeable aqueous Zn-ion batteries (ZIBs) have obtained extensive attention owing to their high safety, low-cost, environmental friendliness and high energy density. Nevertheless, developing suitable cathode materials remains challenging due to requirements for appropriate microstructure. We present a porous N-doped carbon nanosheet/MnO
2 (NCS/MnO2 ) derived from bacterial cellulose (BC) by a simple route. BC chunks were soaked in urea solution and then carbonized under Ar flow at 900 °C. N-doped carbon nanosheets were obtained and MnO2 was added by reaction with NaMnO4 . Benefiting from both the conductivity and porosity of the NCS support, the NCS/MnO2 composite delivers a high capacity and long cycling stability (114 mA h g−1 at 2 A g−1 after 1800 cycles). The electrode reaction mechanism was further investigated and the MnO2 dissolution/deposition mechanism was confirmed, with a critical role of zinc sulfate hydroxide (ZSH) to assist the deposition of MnO2 . [ABSTRACT FROM AUTHOR]- Published
- 2023
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