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In this paper, carbon nanotubes and graphene are combined with traditional conductive agent (Super-P/KS-15) to prepare a new type of composite conductive agent to study the effect of composite conductive agent on the internal resistance and performance of lithium iron phosphate batteries. Through the SEM, internal resistance test and electrochemical performance test, carbon nanotubes and graphene composite traditional conductive agent (Super-P/KS-15) form an effective three-dimensional conductive network of points, lines, and surfaces. When the ratio of graphene to carbon nanotubes is 1:3 to compound the traditional conductive agent, the prepared pole piece has a higher compaction density, and the prepared battery has the smallest battery internal resistance. The increase in internal resistance after the cycle is also minimized, which shows the most excellent processing performance and electrochemical performance.
Ionics – Springer Journals
Published: Jul 1, 2022
Keywords: Composite conductive agent; Lithium iron phosphate batteries; Internal resistance; Electrochemical performance
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