Kwak, Jin Hwan Hyun, Jong Chan Park, Jae-Ho Chung, Kyung Yoon Yu, Seung-Ho Yun, Young Soo Lim, Hee-Dae 2024-01-19T15:03:26Z 2024-01-19T15:03:26Z 2021-09-04 2021-04 1226-086X https://pubs.kist.re.kr/handle/201004/117224 As promising candidates for next-generation batteries, calcium-ion batteries (CIBs) have attracted significant attention because of the lower cost and improved environmental friendliness of Ca metal relative to those of Li and their potential to deliver higher energy densities. However, their practical application has been limited by the lack of an appropriate electrode that can induce fast Ca co-intercalation/deintercalation reactions while providing longer cycle life. In this study, we report bacterial cellulose (BC) with a highly graphitic-like ordered structure as a new and efficient co-intercalation host for multivalent Ca ions. The free-standing BC electrode with unique 3D porous morphology possessed ultra-fast co-intercalation kinetics, much faster than that for a commercial graphite electrode. In addition, we addressed the controversial issue of whether Ca co-intercalation truly occurs in the graphitic layer. It is demonstrated that the co-intercalation is directly dependent on the degree of carbon crystallinity by using various BC electrodes with different crystallinities at regular intervals. Finally, the effect of the ordering of the carbon stacking layer on the co-intercalation chemistry was electrochemically investigated. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Ultra-fast and efficient calcium co-intercalation host enabled by hierarchically 3D porous carbon nanotemplates Article 10.1016/j.jiec.2021.02.006 1 Journal of Industrial and Engineering Chemistry, v.96, pp.397 - 403 Journal of Industrial and Engineering Chemistry 96 397 403 N scie scopus kci ART002722994 000622319100013 2-s2.0-85101385408 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article Ca batteries Co-intercalation Crystallinity Carbonization Carbon materials Bacterial cellulose 3D structure