轨道杂化诱导吸附-催化效应在四电子水系锌碘电池的应用  

Practical four-electron zinc-iodine aqueous batteries enabled by orbital hybridization induced adsorption-catalysis

作　　者：刘婷婷 雷成俊 王徽健 徐琛 马文娇 贺鑫 梁宵 Tingting Liu;Chengjun Lei;Huijian Wang;Chen Xu;Wenjiao Ma;Xin He;Xiao Liang(State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Advanced Catalytic Engineering Research Center of the Ministry of Education,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Advanced Catalytic Engineering Research Center of the Ministry of Education,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China

出　　处：《Science Bulletin》2024年第11期1674-1685,共12页科学通报（英文版）

基　　金：supported by the National Key R&D Program of China(2022YFB3807700 and 2019YFA0210600);the National Natural Science Foundation of China(51972107 and 22309048);the Natural Science Foundation of Hunan Province(2023JJ40121);the Major Program of the Natural Science Foundation of Hunan Province(2021JC0006)。

摘　　要：The successive I^(–)/I^(0)/I^(+)redox couples in the four-electron zinc-iodine aqueous battery(4eZIB)is plagued by the instability of the electrophilic I~+species,which could either be hydrolyzed or be neutralized by the I_(3)~–redox intermediates.We present an adsorption-catalysis approach that effectively suppresses the hydrolysis of ICl species and also provides an enhanced reaction kinetics to surpass the formation of triiodide ions.We elucidate that the improved stability is attributed to the pronounced orbital hybridization between the d orbitals of Fe-N_4 moieties(atomic Fe supported on nitrogen doped carbon)and the p orbitals of iodine species(I_(2)and ICl).Such d-p orbital hybridization leads to enhanced adsorption for iodine species,increased energy barrier for proton detachment from the ICl.HOH intermediate during hydrolysis,and efficient catalysis of the iodine redox reactions with high conversion efficiency.The proposed 4eZIB demonstrates practical areal capacity(>3 mAh cm^(-2))with a near-unity coulombic efficiency,high energy density of 420 Wh kg^(-1)(based on cathode mass),and long-term stability(over 10,000 cycles).Even at–20℃,the battery exhibits stable performance for over 1000 cycles with high iodine utilization ratio.

关 键 词：ICL TRIIODIDE Hydrolysis ELECTROCATALYSIS d-p orbital hybridization 

分 类 号：O643.3[理学—物理化学] O647.3[理学—化学] TM912[电气工程—电力电子与电力传动]