Abstract
Composite positive electrodes for all-solid-state In/LiCoO 2 cells with Li 2S–P 2S 5 glass–ceramic electrolytes were designed in order to improve rate performances of the cells. In the composite positive electrodes with LiCoO 2 in 40 wt.% and the glass–ceramic electrolyte in 60 wt.%, suitable lithium ion conducting paths were formed, and the addition of vapor grown carbon fiber (VGCF) made it easier to form electron-conducting paths. The solid-state cell kept high capacities of about 90 mAh g − 1 even under high current densities of over 1 mA cm − 2 after charged and discharged under low current densities for 100 cycles. It was, thus, suggested that high rate performances of all-solid-state cells were achieved by controlling the mixed state of composite electrodes and the operating condition during charge–discharge cycles.
Published Version
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