Synthesis of O-Doped and Hierarchical Porous Structured Carbons as Bifunctional Materials for Li-Ion Batteries and Zinc-Ion Supercapacitors
Synthesis of O-Doped and Hierarchical Porous Structured Carbons as Bifunctional Materials for Li-Ion Batteries and Zinc-Ion Supercapacitors
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DOI：
10.1021/acs.energyfuels.1c03565
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发表时间：
2021-12
期刊：
影响因子：
5.3
通讯作者：
Wei Yang;Wei Lu;Wen Wang
中科院分区：
文献类型：
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作者：
Wei Yang;Wei Lu;Wen Wang
由于人类生产活动的快速发展对化石能源的过度消耗，资源的消失和生存环境的恶化迫使研究人员开发新的储能材料。为此，我们开发了具有高比表面积的O掺杂碳，其具有优异的储能能力。对于锂离子电池负极材料的应用，所制备的掺氧碳材料具有最高的放电比容量，约为1000 mAh。g-1时的初始电流密度为3211.7 mAh·g-1，在1 A·g-1时循环稳定性良好，约200次循环，是一个相对较高的电流密度。此外，所获得的O掺杂碳还用作锌离子超级电容器（Zinc ion supercapacitor，Zinc ion supercapacitor）中的阴极材料，其在83 W·kg-1下显示出高达约144.2 Wh·kg-1的最大能量密度，表现出超过7000次循环的长寿命循环能力。上述性质表明，合成的碳是用于LIB和LIB中的能量存储的双功能材料，这可能归因于存在丰富的O-掺杂和分级多孔结构。
Due to the overconsumption of fossil energy by the rapid pace of human production activities, the disappearing resources and deterioration of the living environment force researchers to exploit novel materials for energy storage. For this purpose, we developed O-doped carbons with an ultrahigh specific surface area possessing excellent ability for energy storage. For the application of lithium-ion batteries (LIBs) as anode materials, the prepared O-doped carbons show the highest specific discharge capacity of ca. 3211.7 mAh·g–1at 0.1 A·g–1initially, with the good cyclic stability of about 200 cycles at 1 A·g–1, which is a relatively high current density. Moreover, the obtained O-doped carbons are also used as cathode materials in zinc-ion supercapacitors (ZSs), which display a maximum energy density of up to about 144.2 Wh·kg–1at 83 W·kg–1, exhibiting a long-life cyclic ability over 7000 cycles. The above-mentioned properties demonstrate that the synthesized carbons are bifunctional materials for energy storage in LIBs and ZSs, which may be assigned to the existence of abundant O-doped and hierarchical porous structures.