Enhanced Fast Charging Capabilities in Natural Graphite/Iron Cross-Linked Pectin Electrodes for Lithium-Ion Batteries was selected for inside front cover art of the《Material Advances》
Chin-Yi Chung, Wei-Ming Chen, Yan-Ruei Chen, Liang-Yu Chen, Yu-Hsuan Su, Po-Wei Chi, Phillip M. Wu, Kuei-Shu Chang-Liao, Hong-Yi Tang, Maw-Kuen Wu.
Rapid charging capabilities are required for the broader adoption of lithium-ion batteries in emerging technologies such as electric vehicles. Although commercial graphite anodes provide a high energy density, their limitations in quick charging warrant the exploration of novel materials. This study extends prior research on the use of pectin, a natural polysaccharide, as an organic binder for graphite anodes. By introducing iron into pectin, we propose a unique ion-crosslinking mechanism that causes the graphite anode to exhibit pseudocapacitive Li storage. Our findings, corroborated by 3D Bode analysis and AC impedance spectra, revealed a positive correlation between the iron ion and the pseudocapacitive vertex in the graphite reaction. Compared with conventional binders, graphite electrodes utilizing iron-doped pectin demonstrated superior initial and stable capacities, reaching 450 mA h g−1 after 100 cycles at 1C. This study highlights the synergistic effect of pectin and iron ions, offering a new avenue for high-performance, rapid-charging, and environmentally sustainable lithium-ion batteries.
WebSite: https://pubs.rsc.org/en/content/articlelanding/2024/ma/d4ma00584h