In this article, the two-layer sandwiched graphene@LiFe0.Co0.8O2 nanoparticles (SG@LFCO) have been prepared and investigated as high-rate and long-life cathode materials for rechargeable lithium-ion batteries. The materials possess a high-surface area (267.1 m(2) g(-1)) and lots of void spaces. By combining various favorable conditions, such as Fe doping, coating graphene, and designing novel morphology, the as-prepared materials deliver a specific capacity of 115 mAh g(-1) at 10 C. At the 0.1 C cycling rate, the capacity retention of 97.2% is sustained after 250 cycles and a coulombic efficiency of around 97.6% is obtained.
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Liu et al. (2015) studied this question.
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