A Lithium-ion Battery Using Partially Lithiated Graphite Anode and
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A Lithium-ion Battery Using Partially Lithiated Graphite Anode and
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Received: 19 June 2017 Accepted: 10 October 2017 Published: xx xx xxxx
A Lithium-ion Battery Using Partially Lithiated Graphite Anode and Amphi-redox LiMn2O4 Cathode Yuju Jeon, Hyun Kuk Noh & Hyun-Kon Song Delithiation followed by lithiation of Li+-occupied (n-type) tetrahedral sites of cubic LiMn2O4 spinel (LMO) at ~4 VLi/Li+ (delivering ~100 mAh gLMO−1) has been used for energy storage by lithium ion batteries (LIBs). In this work, we utilized unoccupied (p-type) octahedral sites of LMO available for lithiation at ~3 VLi/Li+ (delivering additional ~100 mAh gLMO−1) that have never been used for LIBs in fullcell configuration. The whole capacity of amphi-redox LMO, including both oxidizable n-type and reducible p-type redox sites, at ~200 mAh gLMO−1 was realized by using the reactions both at 4 VLi/Li+ and 3 VLi/Li+. Durable reversibility of the 3 V reaction was achieved by graphene-wrapping LMO nanoparticles (LMO@Gn). Prelithiated graphite (LinC6, n 4.5 V)2 are the most popular candidates that battery makers are interested in. Recently, we reported that the electrochemistry of Mn4+/3+ of LMO around 3 V (Liy[Mn3+yMn4+2−y]O4 at 1
