Bipolar stackings high voltage and high cell level energy density sulfide based all-solid-state batteries
Bipolar stackings high voltage and high cell level energy density sulfide based all-solid-state batteries
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DOI：
10.1016/j.ensm.2022.03.012
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发表时间：
2022-04-06
影响因子：
20.4
通讯作者：
Zhu, Hongli
中科院分区：
文献类型：
--
作者：
Cao, Daxian;Sun, Xiao;Zhu, Hongli
与使用有机液体电解液的锂离子电池相比，全固态锂电池具有更高的安全性和更高的能量密度。ASLBS中的多层双极堆叠可以通过最大限度地减少非活性材料的使用来进一步提高能量密度。然而，由于缺乏强有力的叠层电极和电解液，特别是对于硫化物固体电解质，双极叠层ASLB的制备具有很大的挑战性。这项工作通过容易地堆叠独立和坚固的阴极、电解液和阳极片，成功地组装了高电压的双极堆叠式ASLB。更具体地说，界面稳定的单晶LiNi0.8Mn0.1Co0.1O2、Li6PS5Cl和纳米硅分别作为阴极、电解液和阳极。两亲性乙基纤维素在油墨制备过程中起到分散剂的作用，进而在独立膜中起到粘结剂的作用。双叠层ASLB提供8.2 V的高电压和204 Wh kg(-1)的单元级能量密度，高于单电池的189 Wh kg(-1)。
Compared to the lithium-ion batteries using organic liquid electrolytes, all-solid-state lithium batteries (ASLBs) have the advantages of improved safety and higher energy density. Multilayered bipolar stacking in ASLBs can further improve the energy density by minimizing the use of inactive materials. However, it is highly challenging to fabricate bipolar stacked ASLBs because of lacking vigorous laminated electrodes and electrolyte, especially for sulfide solid electrolytes. This work successfully assembled bipolar stacked ASLBs with high voltage by facilely stacking freestanding and robust cathode, electrolyte, and anode sheets. More specifically, interface stabilized single-crystal LiNi0.8Mn0.1Co0.1O2, Li6PS5Cl, and nano Si act as cathode, electrolyte, and anode individually. Amphipathic ethyl cellulose plays a role as a disperser during ink preparation and further as a binder in the freestanding membranes. The doubly stacked ASLB delivers a high voltage of 8.2 V and cell-level energy density of 204 Wh kg(-1) higher than the 189 Wh kg(-1) of the mono cell.