Stabilizing interface between Li10SnP2S12 and Li metal by molecular layer deposition
Stabilizing interface between Li10SnP2S12 and Li metal by molecular layer deposition
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DOI：
10.1016/j.nanoen.2018.08.030
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发表时间：
2018-11
期刊：
影响因子：
17.6
通讯作者：
Changhong Wang;Yang Zhao;Qian Sun;Xia Li;Yulong Liu;Jianwen Liang;Xiaona Li;Xiaoting Lin;
中科院分区：
文献类型：
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作者：
Changhong Wang;Yang Zhao;Qian Sun;Xia Li;Yulong Liu;Jianwen Liang;Xiaona Li;Xiaoting Lin;
汽车电气化和电网储能迫切需要安全和高能量密度的锂可充电电池。全固态锂金属电池（ASSLMB）被认为是满足这些严格要求的良好选择。然而，锂金属和固态硫化物电解质（SE）之间的界面不稳定性和锂枝晶的形成是有待克服的主要挑战。在这项工作中，分子层沉积（MLD）是第一次开发一个无机-有机混合中间层（alucone）在锂金属和SE之间的界面。研究发现，铝锥层可以作为人工固体电解质界面（SEI）。因此，Li和SE之间的界面反应通过在界面处固有地阻断电子转移而被显著抑制。此外，锂枝晶也被抑制。与LiCoO 2阴极结合，在Li金属上具有30 MLD循环的铝酮的ASSLMB表现出120 mAh g− 1的高初始容量，并且在150次循环后可以保持60 mAh g− 1的容量。这项工作证实了使用MLD来稳定ASSLMBs的SE和Li金属之间的界面。
Safe and high-energy-density lithium rechargeable batteries are urgently required for vehicle electrification and grid energy storage. All-solid-state lithium metal batteries (ASSLMBs) are regarded as a good choice to meet these stringent requirements. However, interfacial instability between Li metal and solid-state sulfide electrolytes (SEs) and lithium dendrite formation are main challenges to be overcome. In this work, molecular layer deposition (MLD) is employed for the first time to develop an inorganic-organic hybrid interlayer (alucone) at the interface between the Li metal and SEs. It is found that the alucone layer can serve as an artificial solid electrolyte interphase (SEI). As a result, interfacial reactions between Li and SEs are significantly suppressed by intrinsically blocking electron transfer at the interface. In addition, lithium dendrites are also suppressed. Coupled with a LiCoO2cathode, ASSLMBs with 30 MLD cycles of alucone on Li metal exhibit a high initial capacity of 120 mAh g−1and can retain a capacity of 60 mAh g−1after 150 cycles. This work exemplifies the use of MLD to stabilize the interface between SEs and Li metal for ASSLMBs.