Tailoring the Charge/Discharge Potentials and Electrochemical Performance of SnO2 Lithium‐Ion Anodes by Transition Metal Co‐Doping,Batteries & Supercaps

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Tailoring the Charge/Discharge Potentials and Electrochemical Performance of SnO2 Lithium‐Ion Anodes by Transition Metal Co‐Doping
Batteries & Supercaps ( IF 5.1 ) Pub Date : 2020-01-03 , DOI: 10.1002/batt.201900154
Adele Birrozzi _{1,

2} , Jakob Asenbauer _{1,

2} , Thomas E. Ashton ₃ , Alexandra R. Groves ₃ , Dorin Geiger ₄ , Ute Kaiser ₄ , Jawwad A. Darr ₃ , Dominic Bresser _{1,

2}

Affiliation

It has been shown that the introduction of several transition metal (TM) dopants into SnO₂ lithium‐ion battery anodes can overcome the issues associated with the irreversible capacity loss from the conversion reaction of SnO₂ and the aggregation of the metallic Sn particles formed upon lithiation. As the choice of the single dopant, however, plays a decisive role for the achievable energy density – precisely its redox potential – we investigate herein TM co‐doped SnO₂, prepared by using a readily scalable continuous hydrothermal flow synthesis (CHFS) process, to tailor the dis‐/charge profile and by this the energy density. It is shown that the judicious choice of different elemental doping combinations in samples made via CHFS simultaneously improves the cycling performance and the full‐cell energy density. To support these findings, we realized a lithium‐ion full‐cell incorporating the best performing co‐doped SnO₂ as negative electrode and high‐voltage LiNi_0.5Mn_1.5O₄ (LNMO) as positive electrode–to the best of our knowledge, the first full‐cell based on such anode material in combination with LNMO as cathode active material.

中文翻译：

通过过渡金属共掺杂调节SnO2锂离子阳极的充放电势和电化学性能。

研究表明，在SnO ₂锂离子电池阳极中引入几种过渡金属（TM）掺杂剂可以克服与SnO ₂的转化反应和在反应过程中形成的金属Sn粒子的聚集导致不可逆的容量损失有关的问题。锂化。但是，由于选择单一掺杂剂对可实现的能量密度（确切地说是其氧化还原电位）起着决定性的作用，我们在此研究了TM共掺杂的SnO ₂通过使用易于扩展的连续水热流合成（CHFS）工艺来制备，以调整排放/电荷分布以及由此的能量密度。结果表明，在通过CHFS制备的样品中明智地选择不同的元素掺杂组合可以同时改善循环性能和全电池能量密度。为了支持这些发现，我们实现了锂离子全电池，该电池结合了性能最佳的共掺杂SnO ₂作为负电极和高压LiNi _0.5 Mn _1.5 O ₄（LNMO）作为正电极，据我们所知，第一个基于这种阳极材料并结合LNMO作为阴极活性材料的全电池。

更新日期：2020-01-04

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