In:
Angewandte Chemie, Wiley, Vol. 132, No. 29 ( 2020-07-13), p. 11882-11886
Abstract:
The garnet electrolyte presents poor wettability with Li metal, resulting in an extremely large interfacial impedance and drastic growth of Li dendrites. Herein, a novel ultra‐stable conductive composite interface (CCI) consisting of Li y Sn alloy and Li 3 N is constructed in situ between Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) pellet and Li metal by a conversion reaction of SnN x with Li metal at 300 °C. The Li y Sn alloy as a continuous and robust bridge between LLZTO and Li metal can effectively reduce the LLZTO/Li interfacial resistance from 4468.0 Ω to 164.8 Ω. Meanwhile, the Li 3 N as a fast Li‐ion channel can efficiently transfer Li ions and give their uniform distribution at the LLZTO/Li interface. Therefore, the Li/LLZTO@CCI/Li symmetric battery stably cycles for 1200 h without short circuit, and the all‐solid‐state high‐voltage Li/LLZTO@CCI/LiNi 0.5 Co 0.2 Mn 0.3 O 2 battery achieves a specific capacity of 161.4 mAh g −1 at 0.25 C with a capacity retention rate of 92.6 % and coulombic efficiency of 100.0 % after 200 cycles at 25 °C.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v132.29
DOI:
10.1002/ange.202000547
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
505868-5
detail.hit.zdb_id:
506609-8
detail.hit.zdb_id:
514305-6
detail.hit.zdb_id:
505872-7
detail.hit.zdb_id:
1479266-7
detail.hit.zdb_id:
505867-3
detail.hit.zdb_id:
506259-7