摘要
锌-空气电池作为一种重要的电化学能源存储和转换技术,因其能量密度高、成本低和环境友好等优点受到广泛关注。然而,由于其空气阴极缓慢的动力学反应,阻碍了锌-空气电池的进一步发展。因此,我们采用了一种水热-高温热解-氨气还原的方法,制备出ZIF-67衍生N掺杂碳基Co和Co_(9)S_(8)纳米颗粒的电催化剂(Co/Co_(9)S_(8)@NC-1)。电化学测试结果表明,该催化剂具有优异的ORR催化活性,其半波电位为0.85 V,接近商用Pt/C。与基于Pt/C+Ir/C的锌-空气电池(开路电压:1.47 V)相比,Co/Co_(9)S_(8)@NC-1基的锌-空气电池具有1.51 V的开路电压,且表现出105.3 mW/cm的功率密度和172 h循环稳定性(Pt/C+Ir/C:147 h)。此工作为开发非贵金属基ORR催化剂提供了有效途径。
As an important electrochemical energy conversion and storage device,Zinc-air batteries(ZABs)have attracted attention because of their high energy density,low cost and environmental friendliness.However,the slow kinetic reaction of the air cathodes has hindered development of ZABs.Therefore,we used a hydrothermal pyrolytic-ammonia reduction method to prepare an electrocatalyst of ZIF-67 derived N-doped carbon-based Co and Co_(9)S_(8)nanoparticles(Co/Co_(9)S_(8)@NC-1).The electrochemical results show that the sample has excellent ORR catalytic activity,and its half-wave potential is 0.85 V,which is close to commercial Pt/C.Compared with Pt/C+Ir/C-based ZABs(open circuit voltage of 1.47 V),Co/Co_(9)S_(8)@NC-1 based ZABs have an open circuit voltage of 1.51 V,and exhibit a power density of 105.3 mW/cm 2 and cycle stability of 172 h(Pt/C+Ir/C of 147 h).This work provides an effective way to develop non-precious metal-based ORR catalysts.
作者
毕鹏飞
刘培涛
祖延清
李晓东
朱旭
冯爱玲
BI Pengfei;LIU Peitao;ZU Yanqing;LI Xiaodong;ZHU Xu;FENG Ailing(Institute of Physics&Optoelectronics Technology,Baoji University of Arts and Sciences,Baoji 721016,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第7期7150-7156,共7页
Journal of Functional Materials
基金
国家自然科学基金(51801001)
陕西省重点研发计划(2019GY-197)
中国博士后科学基金面上项目(2016M601878)
陕西省教育厅科研专项项目(21JK0478)
宝鸡文理学院重点项目(209040127)。
