A surface-reactive high-modulus binder for the reversible conversion reaction of nanoparticular cobalt oxide. (20th January 2017)

• Record Type: Journal Article
• Authors: Lee, Myeong-Hee; Kim, Tae-Hee; Hwang, Chihyun; Kim, Jieun; Song, Hyun-Kon
• Is Part Of: Electrochimica acta. Volume 225(2017)
• Page Start: 78
• Page End: 85
• Publication Date: 2017-01-20
• Subjects: lithium ion batteries -- binders -- anodes -- conversion reactions -- cobalt oxides; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.12.082
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Conversion-reaction-based anode materials for lithium ion batteries (LIBs) such as transition metal oxides have been considered as high-capacity alternatives to graphite. In the conversion reactions, interestingly, microparticles have been known to be superior to nanoparticles in terms of capacity retention along repeated cycles. In this work, a cross-linked two-component binder system of poly(acrylic acid) and carboxymethyl cellulose (PAA/CMC) was used for nanoparticular Co3 O4 . The binder was characterized by high modulus and strong bonding to the surface oxide of Co3 O4 . Even without carbon coating, the composite electrodes of nanoparticular Co3 O4 in the presence of PAA/CMC showed significantly enhanced cycle retention with improved reversibility of the conversion reaction.