Nanoscaled Na3PS4 Solid Electrolyte for All-Solid-State FeS2/Na Batteries with Ultrahigh Initial Coulombic Efficiency of 95% and Excellent Cyclic Performances,ACS Applied Materials & Interfaces

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Nanoscaled Na3PS4 Solid Electrolyte for All-Solid-State FeS2/Na Batteries with Ultrahigh Initial Coulombic Efficiency of 95% and Excellent Cyclic Performances
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-04-02 00:00:00 , DOI: 10.1021/acsami.8b01805
Hongli Wan _{1,

2} , Jean Pierre Mwizerwa _{1,

2} , Xingguo Qi _{2,

3} , Xiaoxiong Xu ₁ , Hong Li ₃ , Qiang Zhang _{1,

2} , Liangting Cai ₁ , Yong-Sheng Hu ₃ , Xiayin Yao ₁

Affiliation

Nanosized Na₃PS₄ solid electrolyte with an ionic conductivity of 8.44 × 10^–5 S cm^–1 at room temperature is synthesized by a liquid-phase reaction. The resultant all-solid-state FeS₂/Na₃PS₄/Na batteries show an extraordinary high initial Coulombic efficiency of 95% and demonstrate high energy density of 611 Wh kg^–1 at current density of 20 mA g^–1 at room temperature. The outstanding performances of the battery can be ascribed to good interface compatibility and intimate solid–solid contact at FeS₂ electrode/nanosized Na₃PS₄ solid electrolytes interface. Meanwhile, excellent cycling stability is achieved for the battery after cycling at 60 mA g^–1 for 100 cycles, showing a high capacity of 287 mAh g^–1 with the capacity retention of 80%.

中文翻译：

用于全固态FeS ₂ / Na电池的纳米级Na ₃ PS ₄固体电解质，具有95％的超高初始库仑效率和出色的循环性能

通过液相反应合成了在室温下离子电导率为8.44×10 ^–5 S cm ^–1的纳米级Na ₃ PS ₄固体电解质。所得的全固态FeS ₂ / Na ₃ PS ₄ / Na电池在室温下显示出非常高的初始库仑效率，为95％，并在室温下以20 mA g ^–1的电流密度显示了611 Wh kg ^–1的高能量密度。。电池的出色性能归因于良好的界面兼容性以及在FeS ₂电极/纳米级Na ₃ PS _4上紧密的固-固接触固体电解质界面。同时，以60 mA g ^–1循环100次后，电池具有出色的循环稳定性，显示出287 mAh g ^–1的高容量，容量保持率达80％。

更新日期：2018-04-02

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