Simple Fabrication of Ti3C2/MnO2 Composites as Cathode Material for High Capacity and Long Cycle Lifespan Zn‐ion Batteries

• Published in: Energy technology (Weinheim, Germany) Germany), 2023-07, Vol.11 (7), p.n/a
• Main Authors: Xi, Shuang, Cheng, Ximing, Gao, Xingwei, Sun, Zhijian, Liu, Huilong
• Format: Article
• Language: English
• Subjects: Cathodes; Cycles; Electrical resistivity; Electrochemistry; Electrode materials; Energy storage; Fabrication; Life span; Manganese dioxide; MXene; Rechargeable batteries; rechargeable Zn-MnO2 batteries; Storage systems; Structural stability; Zinc
• ISSN: 2194-4288; 2194-4296
• DOI: 10.1002/ente.202300122

Rechargeable aqueous Zn‐MnO2 batteries are potential candidates for electrochemical energy storage systems due to their easy fabrication, nontoxicity, and low‐cost features. However, the practical application of the MnO2‐based cathode is impeded by its low electrical conductivity and poor stability during cycling. Herein, the Ti3C2/MnO2 composite cathode is elaborately designed and fabricated via a simple mechanical grinding method. Benefiting from the high conductivity of Ti3C2 MXene along with the abundant active sites of nano‐MnO2, the obtained Ti3C2/MnO2 electrode shows fast ion transfer and enhanced structural stability. Therefore, Ti3C2/MnO2 composite as the cathode of zinc ion battery exhibits superior charge storage performance (354 mAh g−1 at 0.2 A g−1, which is 30% higher than that of pure MnO2 cathode), high cycling stability (85% capacitance retention along with about 100% columbic efficiency after 850 cycles at l A g−1), excellent energy density (467.33 Wh kg−l at 260 W kg−1), and impressive long‐term lifespan (65.1 mAh g−1 over 900 h at 0.1 A g−1). Furthermore, the mechanism related is elucidated via comprehensive characterizations. Herein, it provides a convenient and efficient method to fabricate high‐performance Mn‐based cathode for Zinc‐ion batteries. Ti3C2/MnO2 cathode of zinc ion battery is elaborately designed and fabricated via a simple mechanical grinding method, which shows superior charge storage performance, high cycling stability, excellent energy density, and impressive long‐term lifespan due to the high conductivity of Ti3C2 MXene along with the abundant active sites of nano‐MnO2.