Performance optimization of freestanding MWCNT-LiFePO₄ sheets as cathodes for improved specific capacity of lithium-ion batteries.

ABSTRACT: The typical lithium-ion-battery positive electrode of "lithium-iron phosphate (LiFePO₄) on aluminum foil" contains a relatively large amount of inactive materials of 29 wt% (22 wt% aluminum foil + 7 wt% polymeric binder and graphitic conductor) which limits its maximum specific capacity to 120.7 mA h g^-1 (71 wt% LiFePO₄) instead of 170 mA h g^-1 (100 wt% LiFePO₄). We replaced the aluminum current-collector with a multi-walled carbon nanotube (MWCNT) network. We optimized the specific capacity of the "freestanding MWCNT-LiFePO₄" positive electrode. Through the optimization of our unique surface-engineered tape-cast fabrication method, we demonstrated the amount of LiFePO₄ active materials can be as high as 90 wt% wi

SUBMITTER: Susantyoko RA 

PROVIDER: S-EPMC9081850 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature