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

The electrochemical reaction mechanism of Bi₂Te₃ as negative electrode in all solid-state Li-ion battery (LIB) having LiBH₄ as a solid electrolyte is established herein. To observe the effect of nanosized electrode material on the battery performance, Bi₂Te₃ 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 Bi₂Te₃, 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 Bi₂Te₃, as well as better performance of Bi₂Te₃ nanorods over its bulk counterpart, has been proposed herein. [ABSTRACT FROM AUTHOR]