氮掺杂的类石墨烯纳米片的制备及其在锌-空气电池中的应用
Easy Preparation of N-Doped Graphene-like Nanosheets as Excellent Metal-Free Cathodic Electrocatalysts of Zn-Air Battery
作者单位E-mail
杨孝昆 湖南科技大学化学化工学院, 湘潭 411201  
陈阿玲 湖南科技大学化学化工学院, 湘潭 411201  
易清风 湖南科技大学化学化工学院, 湘潭 411201
新能源储存与转换先进材料湖南省重点实验室, 湘潭 411201 
yqfyy2001@hnust.edu.cn 
摘要: 采用一种简单方法制备具有优异氧还原反应(ORR)活性的、无金属的氮掺杂碳材料。以双氰胺(DCD)为氮源,蔗糖、β-环糊精和壳聚糖为不同的碳源,通过简单的热解法制备出氮掺杂的类石墨烯纳米片催化剂CN-nanosh(suc)、CN-nanosh(cyc)和CN-nanosh(ch)。这些催化剂在碱性溶液中表现出优异的ORR活性,以CN-nanosh(suc)为阴极催化剂的锌-空气电池具有201.33mW·cm-2的最大功率密度,在100 mA·cm-2的大电流密度下能持续放电50多小时,电池性能接近目前报道的无金属阴极催化剂锌-空气电池的最好性能。
关键词: 氧还原反应  锌-空气电池  电化学  能量转化  纳米颗粒
基金项目: 国家自然科学基金(No.21875062,21376070)和湖南省重点领域研发计划项目(No.2019GK2034)资助。
Abstract: Carbon-based materials have been paid much attention due to their own good electroactivity and resources availability. Herein, we reported a simple and versatile synthesis strategy for the preparation of nitrogen-doped and metal-free carbon catalysts with excellent oxygen reduction reaction (ORR) electroactivity. Using dicyandiamide (DCD) as nitrogen source and sucrose, β-cyclodextrin and chitosan as different carbon sources, N-doped graphene-like nanosheet samples CN-nanosh(suc), CN-nanosh(cyc) and CN-nanosh(ch) were prepared by an easy pyrolysis of their mixture. The samples exhibited outstanding ORR electroactivity in alkaline media with a comparable performance to the benchmark Pt/C. Alkaline Zn-air battery with the prepared sample CN-nanosh(suc) as the cathodic catalyst displayed the maximum power density of 201.33 mW·cm-2, and its discharge time can last for more than 50 h at a constant current density of 100 mA·cm-2, which is close to the optimum values of the similar Zn-air battery with the metal-free cathodic electrocatalysts reported so far.
Keywords: oxygen reduction reaction  Zn-air battery  electrochemistry  energy conversion  nanoparticles
投稿时间:2020-07-19 修订日期:2020-10-28
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杨孝昆,陈阿玲,易清风.氮掺杂的类石墨烯纳米片的制备及其在锌-空气电池中的应用[J].无机化学学报,2021,37(1):157-170.
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