Superior Fast-Charging Lithium-Ion Batteries Enabled by the High-Speed Solid-State Lithium Transport of an Intermetallic Cu 6 Sn 5 Network.
Lei-Lei LuZheng-Xin ZhuTao MaTe TianHuan-Xin JuXiu-Xia WangJin-Lan PengHong-Bin YaoShu-Hong YuPublished in: Advanced materials (Deerfield Beach, Fla.) (2022)
Superior fast charging is a desirable capability of lithium-ion batteries, which can make electric vehicles a strong competition to traditional fuel vehicles. However, the slow transport of solvated lithium ions in liquid electrolytes is a limiting factor. Here, a Li x Cu 6 Sn 5 intermetallic network is reported to address this issue. Based on electrochemical analysis and X-ray photoelectron spectroscopy mapping, it is demonstrated that the reported intermetallic network can form a high-speed solid-state lithium transport matrix throughout the electrode, which largely reduces the lithium-ion-concentration polarization effect in the graphite anode. Employing this design, superior fast-charging graphite/lithium cobalt oxide full cells are fabricated and tested under strict electrode conditions. At the charging rate of 6 C, the fabricated full cells show a capacity of 145 mAh g -1 with an extraordinary capacity retention of 96.6%. In addition, the full cell also exhibits good electrochemical stability at a high charging rate of 2 C over 100 cycles (96.0% of capacity retention) in comparison to traditional graphite-anode-based cells (86.1% of capacity retention). This work presents a new strategy for fast-charging lithium-ion batteries on the basis of high-speed solid-state lithium transport in intermetallic alloy hosts.
Keyphrases
- mesenchymal stem cells
- solid state
- high speed
- induced apoptosis
- atomic force microscopy
- bone marrow
- high resolution
- cell cycle arrest
- gold nanoparticles
- ionic liquid
- endoplasmic reticulum stress
- signaling pathway
- oxidative stress
- reduced graphene oxide
- ion batteries
- cell death
- mass spectrometry
- stem cells
- cell proliferation
- pi k akt
- molecularly imprinted
- aqueous solution