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Room-Temperature All-solid-state Rechargeable Sodium-ion Batteries with a Cl-doped Na3PS4 Superionic Conductor.
Scientific Reports ( IF 3.8 ) Pub Date : 2016-09-20 , DOI: 10.1038/srep33733
Iek-Heng Chu , Christopher S. Kompella , Han Nguyen , Zhuoying Zhu , Sunny Hy , Zhi Deng , Ying Shirley Meng , Shyue Ping Ong

All-solid-state sodium-ion batteries are promising candidates for large-scale energy storage applications. The key enabler for an all-solid-state architecture is a sodium solid electrolyte that exhibits high Na(+) conductivity at ambient temperatures, as well as excellent phase and electrochemical stability. In this work, we present a first-principles-guided discovery and synthesis of a novel Cl-doped tetragonal Na3PS4 (t-Na3-xPS4-xClx) solid electrolyte with a room-temperature Na(+) conductivity exceeding 1 mS cm(-1). We demonstrate that an all-solid-state TiS2/t-Na3-xPS4-xClx/Na cell utilizing this solid electrolyte can be cycled at room-temperature at a rate of C/10 with a capacity of about 80 mAh g(-1) over 10 cycles. We provide evidence from density functional theory calculations that this excellent electrochemical performance is not only due to the high Na(+) conductivity of the solid electrolyte, but also due to the effect that "salting" Na3PS4 has on the formation of an electronically insulating, ionically conducting solid electrolyte interphase.

中文翻译:

室温全固态可充电钠离子电池,含Cl掺杂的Na3PS4超离子导体。

全固态钠离子电池是大规模储能应用的有希望的候选者。全固态体系结构的关键推动因素是钠固体电解质,该钠固体电解质在环境温度下具有高Na(+)电导率,并且具有出色的相和电化学稳定性。在这项工作中,我们提出了一种第一原理指导的发现和合成新型的Cl掺杂的四方Na3PS4(t-Na3-xPS4-xClx)固体电解质,其室温Na(+)电导率超过1 mS cm(- 1)。我们证明了利用这种固体电解质的全固态TiS2 / t-Na3-xPS4-xClx / Na电池可以在室温下以C / 10的速率循环,容量约为80 mAh g(-1 )超过10个周期。
更新日期:2016-09-22
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