posted on 2022-01-21, 17:10authored byMeiying Li, Hongyi Pan, Tao Liu, Xiaolin Xiong, Xiqian Yu, Yong-Sheng Hu, Hong Li, Xuejie Huang, Liumin Suo, Liquan Chen
Single-function
electronic (carbon) and ionic (electrolyte) conductors
result in unbalanced ionic–electronic charge transport in conventional
3D porous electrodes due to a complex heterogeneous interface and
flexural ionic–electronic transport pathways. Herein, an all-in-one
ionic–electronic transport network wherein Li ions and electrons
migrate in the same channel is proposed in an all-electrochemically
active all-solid-state electrode using dual-carrier conductors (DCC).
As a result, the tortuosity factor in the DCC all-solid-state electrode
is significantly reduced to 1–4 (close to the value of 1.5–10
of existing commercial liquid batteries), and the polarization is
significantly smaller than that of the triple-phase electrode. Our
proposed all-in-one ionic–electronic DCC conducting mechanism
is expected to offer a new feasible way to achieve high-mass-loading
all-solid-state cathodes in practical applications.