A Lithium-ion Battery Using Partially Lithiated Graphite Anode and Amphi-redox LiMn2O4 Cathode. Issue 1 (December 2017)

• Record Type: Journal Article
• Authors: Jeon, Yuju; Noh, Hyun; Song, Hyun-Kon
• Is Part Of: Scientific reports. Volume 7:Issue 1(2017)
• Page Start: 1
• Page End: 9
• Publication Date: 2017-12
• Subjects: Natural history -- Research -- Periodicals; Biology -- Research -- Periodicals; Physical sciences -- Research -- Periodicals; Earth sciences -- Research -- Periodicals; Environmental sciences -- Research -- Periodicals; 502.85
• DOI: 10.1038/s41598-017-14741-x
• Languages: English
• ISSNs: 2045-2322

Abstract

Abstract Delithiation followed by lithiation of Li+ -occupied (n-type) tetrahedral sites of cubic LiMn2 O4 spinel (LMO) at ~4 $${{\bf{V}}}_{{{\bf{Li}}{\boldsymbol{/}}{\bf{Li}}}^{{\boldsymbol{+}}}}$$ V Li / 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 $${{\bf{V}}}_{{{\bf{Li}}{\boldsymbol{/}}{\bf{Li}}}^{{\boldsymbol{+}}}}$$ V Li / Li + (delivering additional ~100 mAh gLMO −1 ) that have never been used for LIBs in full-cell configuration. The whole capacity ofamphi -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 $${{\bf{V}}}_{{{\bf{Li}}{\boldsymbol{/}}{\bf{Li}}}^{{\boldsymbol{+}}}}$$ V Li / Li + and 3 $${{\bf{V}}}_{{{\bf{Li}}{\boldsymbol{/}}{\bf{Li}}}^{{\boldsymbol{+}}}}$$ V Li / Li + . Durable reversibility of the 3 V reaction was achieved by graphene-wrapping LMO nanoparticles (LMO@Gn). Prelithiated graphite (Lin C6, n < 1) was used as anodes to lithiate the unoccupied octahedral sites of LMO for the 3 V reaction.