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High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes
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Journal Article
High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes
2022
Overview
All-solid-state Li batteries (ASSBs) employing inorganic solid electrolytes offer improved safety and are exciting candidates for next-generation energy storage. Herein, we report a family of lithium mixed-metal chlorospinels, Li
2
In
x
Sc
0.666−
x
Cl
4
(0 ≤
x
≤ 0.666), with high ionic conductivity (up to 2.0 mS cm
−1
) owing to a highly disordered Li-ion distribution, and low electronic conductivity (4.7 × 10
−10
S cm
−1
), which are implemented for high-performance ASSBs. Owing to the excellent interfacial stability of the SE against uncoated high-voltage cathode materials, ASSBs utilizing LiCoO
2
or LiNi
0.85
Co
0.1
Mn
0.05
O
2
exhibit superior rate capability and long-term cycling (up to 4.8 V versus Li
+
/Li) compared to state-of-the-art ASSBs. In particular, the ASSB with LiNi
0.85
Co
0.1
Mn
0.05
O
2
exhibits a long life of >3,000 cycles with 80% capacity retention at room temperature. High cathode loadings are also demonstrated in ASSBs with stable capacity retention of >4 mAh cm
−2
(~190 mAh g
−1
).
Intensive research is underway to develop solid-state electrolytes for rechargeable batteries. Here the authors report a family of mixed-metal halospinel electrolytes that exhibits promising properties for high-performance solid-state batteries.
