Defect chemistry of interfacial storage
Chia-Chin Chen, Lijun Fu, Dominik Samuelis
An extra Li storage in M/Li2O and M/LiF nanocomposites was observed, besides bulk insertion and conversion reaction. Li ions are accommodated at the LiX side; electrons are stored at metal side; Neither of the composites’ constituents can store Li, but the composite synergistically can, therefore this is also called ‘Job-Sharing mechanism’ [1, 2].
When the particle size of the nanocomposites is small enough, the interfacial storage and bulk storage can be blurred, thus the interfacial storage provides a bridge between supercapacitor and Li-ion battery (Scheme. 1).
A thermodynamic model for interfacial storage was developed, which describes both semi-infinite and mesoscopic boundary conditions .