Advanced Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Solid‐state sodium metal batteries (SSMBs) are considered as one highly competitive, high‐energy‐density yet safe energy storage device, however, the conventional quasi‐solid‐state electrolytes (QSSEs) still suffer from low ion conductivity and limited mechanical properties. Herein, a safe, fast‐charging, long‐life SSMB is reported, utilizing photopolymerized ethoxylated trimethylpropane triacrylate based QSSEs (BN‐QSSE) reinforced by 2D functional fillers of boron nitride nanosheets (BNNSs). The BNNSs with high Young's modulus in BN‐QSSE can simultaneously accelerate homogenize transport for uniform Na deposition form robust electrolyte‐Na interface. Only proportion 1% effectively realize ionic 1 × 10 −2 mS cm −1 , achieve wide electrochemical stability window 4.85 V (vs. Na/Na + ), substantively suppress dendrites. resulting Na||BN‐QSSE||Na symmetric exhibit long life 600 h at 0.1 mA mAh . as‐assembled 3 2 (PO 4 ) ||BN‐QSSE||Na full display capacities 102 g C 75 rate 15 C, maintain 93% initial discharge capacity after 1000 cycles outperforming most reported SSMBs. developed filler‐reinforced QSSE provides new opportunities high‐performance

Язык: Английский