National Institute of Advanced Industrial Science and Technology

About: National Institute of Advanced Industrial Science and Technology is a government organization based out in Tsukuba, Ibaraki, Japan. It is known for research contribution in the topics: Catalysis & Thin film. The organization has 22114 authors who have published 65856 publications receiving 1669827 citations. The organization is also known as: Sangyō Gijutsu Sōgō Kenkyū-sho.

Facile Synthesis of Ultrasmall CoS2 Nanoparticles within Thin N‐Doped Porous Carbon Shell for High Performance Lithium‐Ion Batteries

Abstract: C obalt sulfi de (CoS 2 ) is considered one of the most promising alternative anode materials for high-performance lithium-ion batteries (LIBs) by virtue of its remarkable electrical conductivity, high theoretical capacity, and low cost. However, it suffers from a poor cycling stability and low rate capability because of its volume expansion and dissolution of the polysulfi de intermediates in the organic electrolytes during the battery charge/discharge process. In this study, a novel porous carbon/CoS 2 composite is prepared by using nano metal‐organic framework (MOF) templates for high-preformance LIBs. The as-made ultrasmall CoS 2 (15 nm) nanoparticles in N-rich carbon exhibit promising lithium storage properties with negligible loss of capacity at high charge/discharge rate. At a current density of 100 mA g −1 , a capacity of 560 mA h g −1 is maintained after 50 cycles. Even at a current density as high as 2500 mA g −1 , a reversible capacity of 410 mA h g −1 is obtained. The excellent and highly stable battery performance should be attributed to the synergism of the ultrasmall CoS 2 particles and the thin N-rich porous carbon shells derieved from nanosized MOF precusors.