题目： | concurrent regulation of surface topography and interfacial physicochemistry via trace chelation acid additives toward durable zn anodes |
作者： | yan li1,2#, haoxiang zhang3#, yiwen su4# , yuhan zou2, wenyi guo2, changpeng qiao2, guangping zheng4, qilu li1*, lai xu3*, jingyu sun2* |
单位： | 1school of environment, key laboratory for yellow river and huai river water environmental and pollution control-ministry of education, henan normal university, xinxiang 453007, china. 2college of energy, soochow institute for energy and materials innovations, key laboratory of advanced carbon materials and wearable energy, technologies of jiangsu province, soochow university, suzhou 215006, china. 3institute of functional nano and soft materials (funsom), soochow university, suzhou 215123, china. 4department of mechanical engineering, the hongkong polytechnic university, hunghom, kowloon, hongkong, china. |
摘要： | electrolyte additive engineering is a feasible protocol in improving zn anode stability. typical additive designs center on the regulation of zn deposition; nevertheless, versatile additives are urgently requested to comprehensively manage the surface landscape, interface physicochemistry, and by-product elimination. here, a straightforward strategy is presented to meet such needs employing an environmentally-friendly chelator, hydroxyethyl ethylenediaminetriacetate acid (hedta), as an additive for znso4 electrolyte. throughout theoretical computations and experimental investigations, it is demonstrated that protons released from the gradual ionization of hedta during rest periods aid in the mild engraving of the zn surface. both the amino and carboxyl groups of hedta− can be protonated, which effectively buffers the interfacial ph value in the entire battery lifespan and eliminates the formation of by-products. the hedta− anions can also adsorb onto the zn surface, helping facilitate zn2 mass transfer and accelerate the desolvation process. benefiting from the synchronous modulation of surface topography and interfacial physicochemistry, the assembled half cells affording hedta additive maintain a durable operation of up to 8821 cycles at 5.0 ma cm−2/1.0 mah cm−2. additionally, symmetric cells manifest stable cycling for over 4600 h at 0.5 ma cm−2/0.25 mah cm−2. |
影响因子： | 18.5 |
分区情况： | 一区 |
链接： | 责任编辑：杜欣 |
