Incorporation of Novel Graphene Nanosheet Materials as Cathode Catalysts in Li–O2 Battery
Incorporation of Novel Graphene Nanosheet Materials as Cathode Catalysts in Li–O2 Battery
复制标题
新型石墨烯纳米片材料作为锂氧气电池阴极催化剂的应用
DOI：
10.1115/1.4056937
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发表时间：
2023
影响因子：
2.5
通讯作者：
Li, Xianglin
中科院分区：
文献类型：
--
作者：
Hassan Zaidi, Syed Shoaib;Sigdel, Shusil;Sorensen, Christopher M.;Kwon, Gibum;Li, Xianglin
该研究报告了石墨烯纳米片（GNS）材料作为锂氧电池阴极催化剂的上级性能优于Vulcan XC。所采用的GNS是从一种新型的、环保的、具有成本效益的技术合成的，该技术涉及氧气（O2）和乙炔（C2 H2）前体的室爆轰。两种GNS催化剂，即，GNS-1和GNS-2制造的O2/C2 H2前体摩尔比分别为0.3和0.5，在这项研究中使用。比表面积（SSA）分析显示，与GNS-2（19 m2 g − 1，0.041 cm 3g − 1）相比，GNS-1（180 m2 g − 1，0.505 cm 3g − 1）的SSA和总孔体积显著更高。与GNS-2和Vulcan XC相比，GNS-1具有最高的放电容量（4.37 Ah g-1）和优越的上级循环稳定性。此外，GNS-1在更高的电流密度（0.2和0.3 mA cm−2）和各种有机电解质下表现出良好的性能。GNS-1的上级性能可归因于其较高的中孔体积、SSA和与其对应物相比的最佳润湿性。
This study reports the superior performance of graphene nanosheet (GNS) materials over Vulcan XC incorporated as a cathode catalyst in Li–O2battery. The GNSs employed were synthesized from a novel, eco-friendly, and cost-effective technique involving chamber detonation of oxygen (O2) and acetylene (C2H2) precursors. Two GNS catalysts i.e., GNS-1 and GNS-2 fabricated with 0.3 and 0.5 O2/C2H2precursor molar ratios, respectively, were utilized in this study. Specific surface area (SSA) analysis revealed significantly higher SSA and total pore volume for GNS-1 (180 m2g−1, 0.505 cm3g−1) as compared with GNS-2 (19 m2g−1, 0.041 cm3g−1). GNS-1 exhibited the highest discharge capacity (4.37 Ah g-1) and superior cycling stability compared with GNS-2 and Vulcan XC. Moreover, GNS-1 demonstrated promising performance at higher current densities (0.2 and 0.3 mA cm−2) and with various organic electrolytes. The superior performance of GNS-1 can be ascribed to its higher mesopore volume, SSA, and optimum wettability compared to its counterparts.