General Scalable Synthesis of Mesoporous Metal Oxide Nanosheets with High Crystallinity for Ultralong‐Life Li–S Batteries

Author:

Wang Biao12,Tang Jiayi1,Jia Suyue1,Xing Zhanqi1,Chen Shaowei1,Deng Yu1,Meng Xiangkang1,Tang Shaochun12ORCID

Affiliation:

1. National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced Microstructures College of Engineering and Applied Sciences Nanjing University Jiangsu 210093 China

2. Haian Institute of High‐Tech Research Nanjing University Nanjing 226600 China

Abstract

AbstractMesoporous metal oxide nanosheets (MMONs) are demonstrated great promise for various catalytic applications such as water splitting, CO2 reduction, and metal–sulfur batteries. However, limited by the conventional high‐temperature synthetic routes, the prepared MMONs expose only a small portion of the effective catalytic sites, which greatly restricts their electrocatalytic activity. Herein, a facile and general glycine‐assisted strategy is developed to synthesize a series of MMONs with high crystallinity and remarkable porosity. Impressively, single‐phase perovskite type MMONs containing up to ten metal cations can be synthesized easily using this method without any further purification step. As a proof of concept, the Li–S cell with mesoporous LaFe0.4Co0.2Ni0.2Cu0.2O3 nanosheets as catalyst achieves superior ultralong cycling life over 1500 cycles at 2 C with only 0.041% capacity decay per cycle and a high areal capacity reaching 6.0 mAh cm−2 at a low electrolyte/sulfur ratio of 5.9 µL mg−1. The improved performance is attributed to abundant active sites and synergistic contribution of multicomponent. This work paves a new avenue for the general synthesis of advanced MMONs and will inspire the practical applications in different fields.

Funder

National Key Research and Development Program of China

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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