Electrostatic Regulation of Na+ Coordination Chemistry for High‑Performance All‑Solid‑State Sodium Batteries (IMAGE)
Caption
- An electrostatic engineering strategy is proposed to regulate the Na+ coordinated structure by employing a fluorinated metal–organic framework as an electron-rich model.
- The abundant electron-rich F sites can accelerate Na-salt disassociation while forcing anions into Na+ coordination structure though electrostatic effect to weaken the Na–O coordination, thus promoting rapid Na+ transport.
- Anion-rich weak Na+ solvation structure is achieved and contributes to a highly stable inorganic-rich solid–electrolyte interphase, significantly enhances the interfacial stability toward Na anode.
- Impressively, Na/Na symmetric cell delivered stable Na plating/stripping over 2500 h, and the assembled all-solid-state sodium metal batteries demonstrated stable performance of over 2000 cycles under high rate of 2 C with capacity retention nearly 100%.
Credit
Penghui Song, Suli Chen*, Junhong Guo, Junchen Wu, Qiongqiong Lu*, Haijiao Xie, Qingsong Wang*, Tianxi Liu.
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License
CC BY-NC-ND