Evolution of disposable bamboo chopsticks into uniform carbon fibers: a smart strategy to fabricate sustainable anodes for Li-ion batteries
Evolution of disposable bamboo chopsticks into uniform carbon fibers: a smart strategy to fabricate sustainable anodes for Li-ion batteries
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DOI：
10.1039/c4ee00602j
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发表时间：
2014-08-01
影响因子：
32.5
通讯作者：
Yu, Ting
中科院分区：
文献类型：
--
作者：
Jiang, Jian;Zhu, Jianhui;Yu, Ting
未来小型消费电子产品或大型电动汽车/电网的发展需要锂离子电池（LIB）不仅具有出色的储能性能，而且成本最低，最重要的是可持续性。在此，我们提出了一个聪明的策略，将用过的一次性竹筷转化为均匀的碳纤维，用于LIB的阳极。本发明涉及一种竹筷子废弃物的回收处理方法，该方法通过在碱性溶液中进行可控水热处理，使竹中大量的天然纤维素纤维原位自发分离和分散。碳化后的碳纤维表现出上级的阳极性能，优于体积庞大的竹炭对应物，和竞争的电化学行为和商业石墨的成本。碳纤维的性能可以通过在每个纤维支架上牢固地生长纳米结构的金属氧化物（如MnO 2）以形成协同的核-壳电极结构来进一步升级。一个类似于710 mA h g（-1）的高可逆容量保持无衰减高达300个循环。我们的战略提出了一种可扩展的路线，将筷子废料转化为碳纤维，为LIB的可持续阳极和经济的多功能碳基混合物提供了一种非常有前途的方法，可用于其他实际应用。
Future development of mini consumer electronits or large electric vehicles/power grids requires Li-ion batteries (LIBs) with not only an outstanding energy-storage performance but also a minimum cost, and the foremost sustainability. Herein, we put forward a smart strategy to convert used disposable bamboo chopsticks into uniform carbon fibers for anodes of LIBs. Bamboo chopsticks waste is recycled and simply treated by a controllable hydrothermal process performed in alkaline solutions, wherein abundant natural cellulose fibers in bamboo in situ get separated and dispersed spontaneously. After carbonization, the evolved carbon fibers exhibit superior anodic performance to the bulky bamboo carbons counterpart, and competitive electrochemical behavior and cost with commercial graphite. The performance of carbon fibers can be further upgraded by growing nanostructured metal oxides (like MnO2) firmly on each fiber scaffold to form a synergetic core-shell electrode architecture. A high reversible capacity of similar to 710 mA h g(-1) is maintained without decay up to 300 cycles. Our strategy presents a scalable route to transform chopsticks waste into carbon fibers, offering a very promising way to make sustainable anodes for LIBs and economical multi-functional carbon-based hybrids available for other practical applications.