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In Situ Carbonized Cellulose-Based Hybrid Film as Flexible Paper Anode for Lithium-Ion Batteries

Cao, Shaomei, Feng, Xin, Song, Yuanyuan, Liu, Hongjiang, Miao, Miao, Fang, Jianhui, Shi, Liyi
ACS Applied Materials & Interfaces 2016 v.8 no.2 pp. 1073-1079
anodes, argon (noble gases), carbon nanotubes, carbonization, cellulose, electrical conductivity, extrusion, films (materials), lithium batteries, nanofibers, paper, papermaking, surface area
Flexible free-standing carbonized cellulose-based hybrid film is integrately designed and served both as paper anode and as lightweight current collector for lithium-ion batteries. The well-supported heterogeneous nanoarchitecture is constructed from Li₄Ti₅O₁₂ (LTO), carbonized cellulose nanofiber (C–CNF) and carbon nanotubes (CNTs) using by a pressured extrusion papermaking method followed by in situ carbonization under argon atmospheres. The in situ carbonization of CNF/CNT hybrid film immobilized with uniform-dispersed LTO results in a dramatic improvement in the electrical conductivity and specific surface area, so that the carbonized paper anode exhibits extraordinary rate and cycling performance compared to the paper anode without carbonization. The flexible, lightweight, single-layer cellulose-based hybrid films after carbonization can be utilized as promising electrode materials for high-performance, low-cost, and environmentally friendly lithium-ion batteries.