Publications

In Situ Investigations of Li-MoS₂ with Planar Batteries

Wan, Jiayu W.; Bao, Wenzhong B.; Liu, Yang L.; Dai, Jiaqi D.; Shen, Fei S.; Zhou, Lihui Z.; Cai, Xinghan C.; Urban, Dan U.; Li, Yuanyuan L.; Jungjohann, Katherine L.; Fuhrer, Michael S.; Hu, Lianghing H.

For this study, a planar microbattery that enables various in situ measurements of lithiation of 2D materials on the individual-flake scale is developed. A large conductivity increase of thick MoS₂ crystallite lithiation due to the formation of a percolative Mo nanoparticle network embedded in a Li₂S matrix is observed. The nanoscale study leads to the development of a novel charging strategy for batteries that largely improves the capacity and cycling performance confirmed in bulk MoS₂/Li coin cells.