Effects of binary conductive additives on electrochemical performance of a sheet-type composite cathode with different weight ratios of LiNi0.6Co0.2Mn0.2O2 in all-solid-state lithium batteries
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All-solid-state lithium batteries (ASSBs) using inorganic sulfide-based solid electrolytes are considered prospective alternativesto existing liquid electrolyte-based batteries owing to benefits such as non-flammability. However, it is difficult to form afavorable solid-solid interface among electrode constituents because all the constituents are solid particles. It is important toform an effective electron conduction network in composite cathode while increasing utilization of active materials and notblocking the lithium ion path, resulting in excellent cell performance. In this study, a mixture of fibrous VGCF and sphericalnano-sized Super P was used to improve rate performance by fabricating valid conduction paths in composite cathodes. Then,composite cathodes of ASSBs containing 70% and 80% active materials (LiNi0.6Co0.2Mn0.2O2) were prepared by a solutionbasedprocess to achieve uniform dispersion of the electrode components in the slurry. We investigated the influence of binarycarbon additives in the cathode of all-solid-state batteries to improve rate performance by constructing an effective electronconduction network.
Abstract
All-solid-state lithium batteries (ASSBs) using inorganic sulfide-based solid electrolytes are considered prospective alternativesto existing liquid electrolyte-based batteries owing to benefits such as non-flammability. However, it is difficult to form afavorable solid-solid interface among electrode constituents because all the constituents are solid particles. It is important toform an effective electron conduction network in composite cathode while increasing utilization of active materials and notblocking the lithium ion path, resulting in excellent cell performance. In this study, a mixture of fibrous VGCF and sphericalnano-sized Super P was used to improve rate performance by fabricating valid conduction paths in composite cathodes. Then,composite cathodes of ASSBs containing 70% and 80% active materials (LiNi0.6Co0.2Mn0.2O2) were prepared by a solutionbasedprocess to achieve uniform dispersion of the electrode components in the slurry. We investigated the influence of binarycarbon additives in the cathode of all-solid-state batteries to improve rate performance by constructing an effective electronconduction network.
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