High dimensional stability of LiCoMnO4 as positive electrodes operating at high voltage for lithium-ion batteries with a long cycle life. (10th January 2018)

• Record Type: Journal Article
• Authors: Ariyoshi, Kingo; Yamamoto, Hiroya; Yamada, Yusuke
• Is Part Of: Electrochimica acta. Volume 260(2018)
• Page Start: 498
• Page End: 503
• Publication Date: 2018-01-10
• Subjects: Lithium-ion battery -- Lithium cobalt manganese oxide -- Dimensional stability; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.12.064
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Dimensionally stable LiCoMnO4 having a spinel-framework structure was developed as a positive electrode of lithium-ion batteries with a long cycle life. Well-crystallized LiCoMnO4 prepared by a two-step solid-state reaction shows large rechargeable capacity of 120 mAh g −1 at high operating voltage of 5 V. Ex-situ XRD measurements of the LiCoMnO4 revealed small change in the cubic lattice parameter ( ca . 0.7%) during charge and discharge. Change in electrode thickness of LiCoMnO4 measured by using a precision dilatometer is accordance with the change in the cubic lattice parameter. The LiCoMnO4 electrode showed high dimensional stability compared with other LiMn2 O4 -based materials having a spinel-framework structure. Highlights: Well-crystallized LiCoMnO4 showed large discharge capacity (120 mAh g −1 ) at 5 V. High dimensional stability of the LiCoMnO4 electrode (0.5%) was revealed by precision dilatometer. Dimensionally stable LiCoMnO4 electrode exhibited good cycleability at high operating voltage.