Superior Rate Capability of High Mass Loading Supercapacitors Fabricated with Carbon Recovered from Methane Cracking
Superior Rate Capability of High Mass Loading Supercapacitors Fabricated with Carbon Recovered from Methane Cracking
复制标题
DOI：
10.3390/inorganics11080316
复制
发表时间：
2023-07
期刊：
影响因子：
2.9
通讯作者：
J. Baptista;J. Shacklock;M. Shaban;A. Alkayal;Killian Lobato;Upul Wijayantha
中科院分区：
文献类型：
--
作者：
J. Baptista;J. Shacklock;M. Shaban;A. Alkayal;Killian Lobato;Upul Wijayantha
用催化甲烷裂解（MC）回收的碳制备了高质量负载（约30 mg/cm2）电极。制备的超级电容器在6 mA/cm2至60 mA/cm2之间的电容保持率为74%，Ragone曲线斜率为- 7 Wh/kW（相比之下，用商用碳制造的高质量负载器件分别为42%和- 31 Wh/kW）。mc回收碳的高速率性能归因于反应过程中产生的炭黑和碳纳米管的存在，这可能增加了电极内的电子和离子电导率。这些结果表明，这种产氢途径的副产品可能是超级电容器的合适活性材料。
High mass loading (ca. 30 mg/cm2) electrodes were prepared with carbon recovered from catalytic methane cracking (MC). As-fabricated supercapacitors displayed 74% of capacitance retention from 6 mA/cm2 to 60 mA/cm2 and a Ragone plot’s slope of −7 Wh/kW (compared to 42% and −31 Wh/kW, respectively, for high mass loading devices fabricated with commercial carbon). The high-rate capability of the MC-recovered carbon is attributed to the presence of carbon black and carbon nanotubes produced during the reaction, which likely increased the electronic and ionic conductivity within the electrode. These results suggest that the by-product of this hydrogen generation route might be a suitable active material for supercapacitors.