Coral-shaped porous LiFePO4/graphene hybrids for high rate and all-climate battery applications

Tailor-designed cathode materials are essential for Li-ion batteries with both high energy density and outstanding capacity retention. Here we have designed and fabricated coral-shaped hierarchical porous LiFePO4/graphene hybrids for lithium-ion batteries. These novel hybrid materials exhibit excellent electrochemical performance over a wide temperature range from −40 °C to +60 °C. Even at −40 °C, the hybrid cathode can deliver a high initial capacity of 120 mAhg−1 and still maintain a discharge capacity of 80 mAhg−1 after 500 cycles with a very low capacity loss of 0.066% per cycle. The excellent wide-temperature performance can be ascribed to the porous structure and fast ion/electronic transport kinetics of the high conductive framework.

Keywords

All-climate, Graphene, Hierarchical porous structures, Li-ion battery, LiFePO

DOI

10.1016/j.ensm.2019.06.020

Citation

Fan , Q , Zhang , Y , Xu , Q , Wang , J , Lei , L , Sun , Y & Lund , P D 2019 , ' Coral-shaped porous LiFePO 4 /graphene hybrids for high rate and all-climate battery applications ' , Energy Storage Materials . https://doi.org/10.1016/j.ensm.2019.06.020

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201907304561

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

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