A convenient and efficient mass-production strategy to fabricate sustainable cathodes for lithium-oxygen batteries: Sucrose-derived active carbon coating technology

作者：Wu, Yuanguo; Zhu, Xingbao^*; Wan, Weihua; Wang, Yu; Ji, Xin; Pan, Xingyu; Lu, Zhe

来源：Electrochimica Acta, 2019, 297: 529-538.

DOI：10.1016/j.electacta.2018.12.011

• Lithium-air battery
• Substrate optimizing
• Sucrose
• Carbon material
• Bimodal pore structure

In this study, we report an eco-friendly and cost-efficient cathode based on sucrose-derived active carbon (SDAC). Ni(NO3)(2) is then co-impregnated into the cathode, which is designed to form a hierarchical pore architecture inside the SDAC that takes into account both the mass transport process of O-2/Li+ and the accommodation of discharge product (Li2O2). Another feature of the cathode is binder-free that circumvents the aggregation of the cathodic active materials and the three-phase boundaries loss. This study is aimed to provide a feasible reference plan to give common cathode substrates an additional capability to catalyze electrochemical reactions without destroying its pristine structure and mission. A lithium-oxygen battery with the cathode delivers a high capacity of 24500 mAh g(-1) at 200 mAh g(-1) in a 1 M LiTFSI/TEGDME electrolyte system. Moreover, the cathode exhibits a pretty good stability in a long-term round-trip test of 1000 cycles. These results suggest that the SDAC with a hierarchical pore structure has the potential to be used in next-generation lithium-oxygen batteries in a facile and cost-efficient manner, moreover, the proposed convenient method is worth applying and popularizing as it can transform even the most mundane into the spectacular.

• 出版日期2019-2-20
• 单位哈尔滨工业大学