Embedding tin nanoparticles in micron-sized disordered carbon for lithium- and sodium-ion anodes

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• 作者：Dominic Bresser ; Franziska Mueller ; Daniel Buchholz ; Elie Paillard ; ^{elie.paillard@uni-muenster.de" class="auth_mail} ; Stefano Passerini ; ^{stefano.passerini@uni-muenster.de" class="auth_mail}
• 关键词：Tin nanoparticles ; Carbon matrix ; Sodium-ion anode ; Lithium-ion anode ; Battery
• 刊名：Electrochimica Acta
• 出版年：10 May, 2014
• 年：2014
• 卷：128
• 期：Complete
• 页码：163-171
• 全文大小：3835 K

文摘

Herein, a new and facile synthesis of a tin-carbon nanocomposite and its electrochemical characterization is presented. Tin nanoparticles were embedded in micron-sized carbonaceous particles, thus successfully preventing the aggregation of tin nanoparticles and buffering the occurring volume strain, which accompanies the reversible (de-)alloying process. Such active material presents specific capacities of around 440 and 390 mAh g^鈭? for applied specific currents of 0.1 and 0.2 A g^鈭?, respectively, as lithium-ion anode using environmentally friendly and cost-efficient carboxymethyl cellulose as binder. Even more remarkably, at very high specific currents of 2, 5, and 10 A g^鈭?, electrodes based on this composite still offer specific capacities of about 280, 240, and 187 mAh g^鈭?, respectively. In addition, this tin-carbon nanocomposite appears highly promising as anode material for sodium-ion batteries, showing very stable cycling performance in a suitable potential range, and specific capacities of more than 180, 150, 130, and 90 mAh g^鈭? for an applied specific current of 12.2, 122, 244, and 610 mA g^鈭?, respectively, thus highlighting the high versatility of this composite active material for both Li-ion and Na-ion battery technologies.