Song Huawei, Su Jian, Wang Chengxin
State Key Laboratory of Optoelectronic Materials and Technologies School of Materials Science and Engineering Sun Yat-sen (Zhongshan) University Guangzhou 510275 P. R. China.
Small Sci. 2020 Nov 12;1(1):2000030. doi: 10.1002/smsc.202000030. eCollection 2021 Jan.
Relay insertion/extraction chemistry of both anions and cations on the cathode is disclosed for non-aqueous rechargeable batteries, different from previous metal-ion batteries (MIBs) and dual-ion batteries (DIBs) of only positively or negatively charged ions. The "anion-cation relay battery (ACRB)" fully uses both negative and positive ions and offers bright prospects for high-specific-energy and large-rate grid scale energy storage. Proof-of-concept ACRBs with commercial Li/Na/K plate as anodes and free-standing few-layered graphitic carbon (FLGC) membrane as cathodes demonstrate impressive overall cell performance (a reversible capacity of ≈300 mAh g at 100 mA g, service life >23 000 cycles with a retention decay of ≈0.0013% per cycle, and a cathode energy density of ≈370 Wh kg at ≈27 kW kg), comparable to the highest level counterparts. The work may set a promising strategy to break the predicament facing by various MIBs and DIBs, and also a direction to forward cost cutting in commercial lithium-ion batteries (LIBs).
本文公开了用于非水可充电电池的阴极上阴离子和阳离子的中继插入/萃取化学，这与之前仅涉及带正电荷或负电荷离子的金属离子电池（MIB）和双离子电池（DIB）不同。“阴离子-阳离子中继电池（ACRB）”充分利用了阴离子和阳离子，为高比能和大倍率电网规模储能提供了光明前景。以商用锂/钠/钾板作为阳极、独立的少层石墨碳（FLGC）膜作为阴极的概念验证ACRB展现出令人印象深刻的整体电池性能（在100 mA g下可逆容量约为300 mAh g，使用寿命>23000次循环，每次循环的保留衰减约为0.0013%，在约27 kW kg时阴极能量密度约为370 Wh kg），与最高水平的同类电池相当。这项工作可能为打破各种MIB和DIB所面临的困境制定了一个有前景的策略，也为降低商用锂离子电池（LIB）的成本指明了方向。
