Abstract：
To meet the ever-increasing demand for high-energy lithium-ion batteries (LIBs), it is imperative to develop next-generation anode materials. Compared to conventional carbon-based anodes, Si-based materials are promising due to their high theoretical capacity and reasonable cost. SiOx, as a Si-derivative anode candidate, is particularly encouraging for its durable cycling life, the practical application of which is, however, severely hindered by low initial Coulombic efficiency (ICE) that leads to continuous lithium consumption. What is worse, low ICE also easily triggers a terrible chain reaction causing bad cycling stability. To further develop SiOx anode, researchers have obtained in-depth understandings regarding its working/failing mechanisms so as to further propose effective remedies for low ICE mitigation. In this sense, herein recent studies investigating the possible causes that fundamentally result in low ICE of SiOx, based on which a variety of solutions addressing the low ICE issue are discussed and summarized, are timely summarized. This perspective provides valuable insights into the rational design of high ICE SiOx anodes and paves the way toward industrial application of SiOx as the next generation LIB anode.
摘要：
为了满足对高能锂离子电池（LIB）不断增长的需求，开发下一代负极材料势在必行。与传统的碳基阳极相比，基于Si的材料由于其高理论容量和合理的成本而具有前景。SiOx,作为硅衍生物阳极候选，特别令人鼓舞的是其持久的循环寿命，它的实际应用是，然而,严重阻碍了低初始库仑效率（ICE），导致持续的锂消耗。更糟糕的是,低ICE也容易引发可怕的连锁反应，导致不良的循环稳定性。为了进一步开发SiOx阳极，研究人员对其工作/失败机制有了深入的了解，以便进一步提出有效的补救措施来缓解低ICE。在这个意义上,本文最近的研究调查了从根本上导致SiOx低ICE的可能原因，在此基础上，讨论和总结了解决低ICE问题的各种解决方案，及时总结。这种观点为高ICESiOx阳极的合理设计提供了有价值的见解，并为SiOx作为下一代LIB阳极的工业应用铺平了道路。
