Hu Anjun, Lv Weiqiang, Lei Tianyu, Chen Wei, Hu Yin, Shu Chaozhu, Wang Xianfu, Xue Lanxin, Huang Jianwen, Du Xinchuan, Wang Hongbo, Tang Kai, Gong Chuanhui, Zhu Jun, He Weidong, Long Jianping, Xiong Jie
State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.
School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.
ACS Nano. 2020 Mar 24;14(3):3490-3499. doi: 10.1021/acsnano.9b09646. Epub 2020 Mar 2.
The aprotic lithium-oxygen (Li-O) battery has triggered tremendous efforts for advanced energy storage due to the high energy density. However, realizing toroid-like LiO deposition in low-donor-number (DN) solvents is still the intractable obstruction. Herein, a heterostructured NiS/ZnInS is elaborately developed and investigated as a promising catalyst to regulate the LiO deposition in low-DN solvents. The as-developed NiS/ZnInS promotes interfacial electron transfer, regulates the adsorption energy of the reaction intermediates, and accelerates O-O bond cleavage, which are convincingly evidenced experimentally and theoretically. As a result, the toroid-like LiO product is achieved in a Li-O battery with low-DN solvents the solvation-mediated pathway, which demonstrates superb cyclability over 490 cycles and a high output capacity of 3682 mA h g. The interface engineering of heterostructure catalysts offers more possibilities for the realization of toroid-like LiO in low-DN solvents, holding great promise in achieving practical applications of Li-O batteries as well as enlightening the material design in catalytic systems.
非质子锂氧（Li - O）电池因其高能量密度引发了人们对先进储能的巨大努力。然而，在低给体数（DN）溶剂中实现环形LiO沉积仍然是一个棘手的障碍。在此，精心开发并研究了一种异质结构的NiS/ZnInS作为一种有前景的催化剂，用于调控低DN溶剂中的LiO沉积。所开发的NiS/ZnInS促进界面电子转移，调节反应中间体的吸附能，并加速O - O键断裂，这在实验和理论上都得到了令人信服的证明。结果，在具有低DN溶剂的Li - O电池中通过溶剂化介导途径实现了环形LiO产物，该电池展示了超过490次循环的出色循环稳定性和3682 mA h g的高输出容量。异质结构催化剂的界面工程为在低DN溶剂中实现环形LiO提供了更多可能性，在实现Li - O电池的实际应用以及启发催化系统中的材料设计方面具有巨大潜力。
