【摘 要】
：
For designing batteries with high-rate and long-life,electronic/ionic transport and reaction must be uni-fied for metal oxide electrodes.However,it remains challenging for effectively integrating the whole sub-strate/active materials/electrolyte interface
【机 构】
：
Key Laboratory of Mobile Materials MOE,and School of Materials Science&Engineering,and International
论文部分内容阅读
For designing batteries with high-rate and long-life,electronic/ionic transport and reaction must be uni-fied for metal oxide electrodes.However,it remains challenging for effectively integrating the whole sub-strate/active materials/electrolyte interfaces.Herein by taking Li ion battery as example,we propose a semiconductor-electrochemistry model by which a general but novel insight has been gained into inter-facial effect in batteries.Different from those traditional viewpoints,this derived model lies across from physics to electrochemistry.A reaction driving force can be expressed in terms of Fermi energy change,based on the tradeoff between electronic and ionic concentration at the reaction interfacial region.There-fore,at thermodynamic-controlled interface I of substrate/electrode,increasing contact areas can afford higher activity for active materials.Whereas at kinetically-governed interface Ⅱ of electrode/electrolyte or inside active materials,it is crucial to guarantee high-reaction Li ionic concentration,with which some sufficient reaction degrees can reach.
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