Chemically Crushed Wood Cellulose Fiber towards High-Performance Sodium-Ion Batteries.
Chemically Crushed Wood Cellulose Fiber towards High-Performance Sodium-Ion Batteries.
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DOI：
10.1021/acsami.5b07583
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发表时间：
2015-10
影响因子：
9.5
通讯作者：
Fei Shen;Hongli Zhu;W. Luo;J. Wan;Lihui Zhou;J. Dai;Bin Zhao;Xiaogang Han;Kun Fu;Liangbing H
中科院分区：
文献类型：
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作者：
Fei Shen;Hongli Zhu;W. Luo;J. Wan;Lihui Zhou;J. Dai;Bin Zhao;Xiaogang Han;Kun Fu;Liangbing H
碳材料作为钠离子电池（SIB）的阳极引起了人们的极大兴趣，因为它具有高性能和低成本。在这里，考虑到木材的丰富性和低成本，我们研究了用于 SIB 的天然木纤维衍生的硬碳阳极。我们发现，木纤维热碳化产生的多孔碳具有586 m(2) g(-1)的高比表面积，而用2,2,6,6-四甲基哌啶-1-氧基(TEMPO)预处理可以有效地将其降低至126 m(2) g(-1)。当评估它们作为 SIB 的阳极时，我们观察到低表面积碳的初始库仑效率高达 72%，而高表面积碳的初始库仑效率为 25%。更重要的是，低表面积碳表现出优异的循环稳定性，在100 mA g(-1)的电流密度下可以提供196 mAh g(-1)的脱钠容量超过200次循环，这表明它是一种有前途的低成本SIB负极。
Carbon materials have attracted great interest as an anode for sodium-ion batteries (SIBs) due to their high performance and low cost. Here, we studied natural wood fiber derived hard carbon anodes for SIBs considering the abundance and low cost of wood. We discovered that a thermal carbonization of wood fiber led to a porous carbon with a high specific surface area of 586 m(2) g(-1), while a pretreatment with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) could effectively decrease it to 126 m(2) g(-1). When evaluating them as anodes for SIBs, we observed that the low surface area carbon resulted in a high initial Coulombic efficiency of 72% compared to 25% of the high surface area carbon. More importantly, the low surface area carbon exhibits an excellent cycling stability that a desodiation capacity of 196 mAh g(-1) can be delivered over 200 cycles at a current density of 100 mA g(-1), indicating a promising anode for low-cost SIBs.