Journal of Power Sources ( IF 9.2 ) Pub Date : 2019-08-26 , DOI: 10.1016/j.jpowsour.2019.227045 Yakun Wang , Mengke Zhang , Yang Dai , Hui-Qiong Wang , Huaiyu Zhang , Qianqian Wang , Wenbo Hou , Hao Yan , Wenrong Li , Jin-Cheng Zheng
N/P co-doped porous carbon is prepared from biomass (silkworm cocoon) and natural product (phytic acid) by an eco-friendly self-activation approach. Owing to the rational pore structure, and abundant pseudocapacitive active sites of heteroatom doping, the prepared Cheese-brick-like porous carbon presents outstanding performances. The optimized S2 sample delivers both high gravimetric capacitance and volumetric capacitance of 317 F g−1 (482 F cm−3) at 1 A g−1, and an impressive capacitance of 159 F g−1 (242 F cm−3) at a high current density of 50 A g−1 in 1 M H2SO4. Also, the thick electrode (10 mg cm−2) can deliver a high areal capacitance up to 2.44 F cm−2 at 10 mA cm−2 and 1.29 F cm−2 at 500 mA cm−2. Additionally, the porous carbon based flexible symmetric supercapacitor (1.4 V) can deliver a remarkable 19.6 Wh kg−1 (29.8 Wh l−1) at 350 W kg−1, and 9.6 Wh kg−1 (14.6 Wh l−1) at 17500 W kg−1, respectively, as well as outstanding cyclic longevity (~98% capacitance retention after 10000 cycles). These attractive performances enable a wonderful potential of our porous carbon applied in supercapacitors for wearable electronics and other energy storage devices.
中文翻译:
氮磷共掺蚕茧基自活化多孔碳,用于高性能超级电容器
N / P共掺杂多孔碳是通过一种生态友好的自活化方法由生物质(桑蚕茧)和天然产物(植酸)制得的。由于其合理的孔结构和杂原子掺杂的丰富的假电容活性位点,所制得的干酪砖样多孔碳具有优异的性能。优化的S2样品在1 A g -1时可提供317 F g -1(482 F cm -3)的高重力电容和体积电容,在1 A g -1时可提供159 F g -1(242 F cm -3)的惊人电容。在1 M H 2 SO 4中具有50 A g -1的高电流密度。另外,厚电极(10 mg cm -2)可以在10 mA cm -2时提供高达2.44 F cm -2的高面积电容,在500 mA cm -2时提供高达1.29 F cm -2的面积电容。此外,基于多孔碳的柔性对称超级电容器(1.4 V)在350 W kg -1时可提供显着的19.6 Wh kg -1(29.8 Wh l -1),在960 W时可提供9.6 Wh kg -1(14.6 Wh l -1)。分别为17500 W kg -1和出色的循环寿命(10000次循环后约98%的电容保持率)。这些引人入胜的性能使我们的多孔碳极有潜力应用于可穿戴电子设备和其他储能设备的超级电容器中。