复合粘结剂对Fe-MOF衍生催化剂组装锌空电池稳定性影响研究  

Effect of composite binder on stability of zinc-air battery assembled by Fe-MOF derived catalyst

作　　者：金虹 苏强 查国君 周来宏 黄平 江民华 丁海峰 JIN Hong;SU Qiang;ZHA Guo-jun;ZHOU Lai-hong;HUANG Ping;JIANG Min-hua;DING Hai-feng(School of New Energy Science and Engineering,Xinyu University,Xinyu 338004,China)

机构地区：[1]新余学院新能源科学与工程学院,江西新余338004

出　　处：《化学研究与应用》2024年第3期616-622,共7页Chemical Research and Application

基　　金：江西省自然科学基金项目(20224BAB204009,20224BAB204017,20224BAB214023)资助;江西省教育厅科技项目(GJJ2202205)资助。

摘　　要：作为锌空电池阴极催化剂之一,新型Fe-MOF基催化剂相对于商业化的Pt/C+RuO_(2)催化剂来说,不仅价格低廉、比电容高,而且具有双功能催化活性,受到锌空电池研究人员的关注。为了提升Fe-MOF衍生催化剂锌空电池长期运行稳定性,本研究通过优化催化层粘结剂组成和制备工艺,制备组装FeMOF-5%PTN-H锌空电池,并与传统Nafion粘结剂组装电池进行性能比较,分析锌空电池长时间充放电循环电化学稳定性提升机制。研究表明,经过长时间充放电循环测试,5%PTN-H复合粘结剂可以有效抑制Fe-MOF催化层脱落,较好地保持了催化剂粒子原有的结构。充放电循环后,FeMOF-5%PTN-H所组装的电池峰功率密度衰减率为2.3%,仅为FeMOF-N组装电池衰减率(44%)的5.3%。由此可见,5%PTN-H复合粘结剂可以有效提升FeMOF衍生催化剂组装锌空电池长期运行稳定性。本研究从材料构效关系角度,分析了催化层粘结剂对电池稳定性的影响机制,为深入理解和优化改进锌空电池长期运行状态具有重要参考意义。As one of the cathode catalysts for zinc-air batteries,the novel Fe-MOF based catalyst have low price,high specific capacitance and dual-function catalytic activity compared with the commercial Pt/C+RuO_(2) catalyst,which has attracted the attention of the zinc-air batteries researchers.In order to improve the stability of Fe-MOF catalyst zinc-air batteries,this study prepared and assembled FeMOF-5%PTN-H zinc-air batteries by optimizing the composition and preparation process of the catalytic layer binder.The performance of the batteries was compared with that of traditional Nafion binders,and the mechanism of long-term electrochemical stability improvement was analyzed.The results show that 5%PTN-H composite binder can effectively inhibit the detachment of Fe-MOF derived catalytic layer and maintain the original structure of catalyst particles after a long time charge-recharge cycling test.After charge-recharge cycling,the peak power density attenuation rate of FeMOF-5%PTN-H assembled battery is 2.3%,which is only 5.3%of FeMOF-N assembled battery(44%).In conclusion,5%PTN-H composite binder can effectively improve the longterm stability of Fe-MOF derived catalyst assembled zinc-air batteries.In this study,the mechanism of the effect of the catalytic layer binder on the stability of the battery was analyzed from the perspective of the structure-activity relationship,which is of great reference value for further understanding and optimizing the long-term operation state of zinc-air batteries.

关 键 词：Fe-MOF衍生催化剂 锌空电池 PTFE 稳定性 

分 类 号：O614.8[理学—无机化学]