The low temperature performance of rice husk based amorphous carbon as anode material for lithium-ion batteries
Carbon based materials are currently the most commonly used electrode materials for lithium-ion bat-teries,although significant capacity loss in carbon based lithium-ion batteries(LIBs)is caused by low tempera-ture.In this paper,porous carbon was prepared from rice husks through high-temperature carbonization.Poros-ity provides more transport pathways and active sites for Li+,as well as promotes the transport and diffusion.The results indicated that carbonization temperatures have an impact on the microstructure of rice husk derived active carbon(RHC),and the performance of batteries constructed based on various RHC electrodes was differ-ent.The RHC-10 negative electrode obtained at 1 000 ℃ has the highest residual reversible specific capacity,reaching 230 mA/g at 0.2 C magnification and 147 mAh/g at 2 C magnification after 100 cycles,respectively.After 10 cycles at different magnification,the highest reversible specific capacity can still be maintained when cycling again at 0.2 C magnification.The reversible specific capacity can reach 175 mAh/g and 98 mAh/g at-20 ℃ and-40 ℃,respectively,demonstrating excellent low-temperature charging and discharging perform-ance.
amorphous carbonlithium-ion batteriesnegative electrode materiallow temperature performancerice husk
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维普
