Electrochemical reaction mechanism for Bi2Te3-based anode material in highly durable all solid-state lithium-ion batteries

The electrochemical reaction mechanism of Bi 2 Te 3 as negative electrode in all solid-state Li -ion battery (LIB) having LiBH 4 as a solid electrolyte is established herein. To observe the effect of nanosized electrode material on the battery performance, Bi 2 Te 3 nanorods were also used as anode material similar to the above battery setup. The galvanostatic discharge/charge profile suggested the first discharge and charge capacities as 533 mAhg −1 and 288 mAhg −1 for bulk Bi 2 Te 3 , which reduced to 219 mAhg −1 and 218 mAhg −1 , respectively, after 50 cycles. In case of nanorods, the first discharge and charge capacity were observed to be 489 mAhg −1 and 281 mAhg −1 , respectively, which reduced to 235 mAhg −1 and 233 mAhg −1 , respectively, after 50 cycles. The mechanism of lithiation/delithiation of Bi 2 Te 3 , as well as better performance of Bi 2 Te 3 nanorods over its bulk counterpart, has been proposed herein.