Reactive boride as a multifunctional interface stabilizer for garnet-type solid electrolyte in all-solid-state lithium batteries.
Mingzhe ChenJing ZhangJiliang ZhangBinkai YuLimin ZhouYao XiaoXu GaoJin XiaoChun-Sheng LiYan SunHuakun LiuShi Xue DouShu-Lei ChouPublished in: Nanoscale (2023)
All-solid-state batteries are one of the most important game changers in electrochemical energy storage since they are free from the risk of leakage of hazardous flammable liquid solvents. Among the various types of solid-state electrolytes, Li 7- x La 3 Zr 2- x Ta x O 12 garnets possess many desirable advantages to be considered a suitable candidate for lithium-ion batteries. However, their practical application has been hindered by premature short-circuits due to lithium dendrite growth, nonnegligible electronic conductivity and interfacial air sensitivity issues. Herein, we propose a multifunctional layer strategy to simultaneously address both the interface and electronic conductivity issues. With the help of a facile chemical process based on reactive cobalt boride, electron leakage was effectively blocked and the electrochemical performance/stability could be well maintained over extended cycles. The cobalt boride-coating layer also possessed an impressive Li metal wetting ability while sustaining a low interfacial resistance. A full cell paired with a commercialized cathode showed satisfactory performance with low overpotentials and a high specific capacity over 150 mA h g -1 . Moreover, first-principle calculations further revealed the status of the rearrangement of the electron cloud behind the charge-density difference, and the nature of the low diffusion energy barrier of the reactive cobalt boride protective layer. Our strategy highlights the necessity of designing proper multifunctional layers in the garnet-type solid-state lithium-ion battery system.
Keyphrases
- solid state
- ionic liquid
- metal organic framework
- reduced graphene oxide
- solar cells
- drug delivery
- electron transfer
- gold nanoparticles
- molecular dynamics simulations
- cancer therapy
- single cell
- ion batteries
- cell therapy
- molecular dynamics
- molecularly imprinted
- label free
- stem cells
- computed tomography
- mass spectrometry
- bone marrow
- liquid chromatography