Sn掺杂球形ZnMnO_(3);的制备及其在铝-空气电池中电化学性能的研究  

Preparation of Sn-doped spherical ZnMnO_(3) and electrochemical performance in Al-air battery

作　　者：张文之 俞小花[1] 冯攀[1] 于梦飞 陈璐 谢刚[1,2,3] Zhang Wenzhi;Yu Xiaohua;Feng Pan;Yu Mengfei;Chen Lu;Xie Gang(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093;Kunming Metallurgical Research Institute Co.,Ltd.,Kunming 650503;State key laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology,Kunming 650503)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]昆明冶金研究院有限公司,昆明650503 [3]共伴生有色金属资源加压湿法冶金技术国家重点实验室,昆明650503

出　　处：《化工新型材料》2021年第11期141-145,共5页New Chemical Materials

基　　金：国家重点研发计划(2019YFC1907900);国家自然科学基金面上项目(51774160);云南省万人计划(YNWR-QNBJ-2018-327);昆明理工大学分析测试基金(2020M20192202020)。

摘　　要：钙钛矿型氧化物由于其晶体结构的独特性及性能的优异性,有望成为新型的氧还原催化剂。以硫酸锰和硝酸锌为原料,碳酸钠为沉淀剂,通过共沉淀法制备Zn-Mn前驱体。经高温煅烧4h,制备出单一形貌的球形钙钛矿型晶体结构ZnMnO_(3)。随后以Sn(NO;);为锡源,制备了不同Sn含量的掺杂ZnMnO_(3)。对制备的样品进行电化学测试,研究了Sn含量对球型ZnMnO_(3)电化学性能的影响。结果表明:当Sn掺杂量为7%时ZnMnO_(3)的导电性和耐腐蚀性皆有所提升,且将其用作铝-空气电池的空气电极催化剂时,在20mA/cm^(2)、40mA/cm^(2)、60mA/cm^(2)、80mA/cm^(2)、100mA/cm^(2)和120mA/cm^(2)的放电电流密度下测试放电性能,放电电压为1.43V、1.35V、1.25V、1.05V、0.89V、0.75V,与其他掺杂量相比7%Sn掺杂量的ZnMnO_(3)放电性能最为优异,在空气电极应用上有广阔前景。Perovskite-type oxides are expected to be a new type of oxygen reduction catalyst due to their unique crystal structure and excellent performance.Manganese sulfate and zinc nitrate were used as raw materials,sodium carbonate as precipitant,Zn-Mn precursor was prepared by coprecipitation method.After high temperature calcination for 4 h,a single morphology spherical perovskite crystal structure ZnMnO_(3)was prepared.Subsequently,Sn(NO;);was used as the tin source to prepare ZnMnO_(3)with different Sn content.Electrochemical tests were carried out on the prepared samples,and the influence of Sn content on the electrochemical performance of spherical ZnMnO_(3)was studied.The results shown that the conductivity and corrosion resistance of ZnMnO_(3)were improved when the doping amount of Sn was 7%.When it was used as the air electrode catalyst of Al-air battery,the discharge performance was tested at the discharge current density of 20 mA/cm^(2),40 mA/cm^(2),60 mA/cm^(2),80 mA/cm^(2),100 mA/cm^(2)and 120 mA/cm^(2).The discharge voltages were 1.43 V,1.35 V,1.25 V,1.05 V,0.89 Vand 0.75 V,respectively.Compared with other doping amounts,ZnMnO_(3)with 7%Sn had the most excellent discharge performance,and broad prospects for air electrode applications.

关 键 词：钙钛矿型 ZnMnO_(3) 掺杂 空气电极 电化学性能 

分 类 号：O643.32[理学—物理化学]