Using a MOF of Wetted Quasi[Zn₄O(bdc)₃] as Both the Battery Separator and the Electrolyteto Prepare All-Solid-State Batteries of Both ASS-LTO/Li and ASS-Gr/Li

Abstract

For the first time, a well-defined all-solid-statelithium battery (denoted as ASS-LTO/Li) assembled by an electrode of lithiumtitanate (Li₄Ti₅O₁₂, LTO), a metal-organicframework (MOF) of wetted quasi [Zn₄O(bdc)₃] and ametallic lithium foil is prepared in this work, in which the wetted quasi [Zn₄O(bdc)₃]is not only employed as a separator but also used as the solid-stateelectrolyte. The initial charge and discharge capacities ofthe as-prepared ASS-LTO/Li at 0.2 C are as high as187.4 and 286.4 mAh·g^-1, respectively, corresponding to a Coulombicefficiency of about 65.4%. More importantly, the discharge capacity ofASS-LTO/Li after 100 cycles at 1 C is still as high as 125 mAh·g^-1. After a thoroughcharacterization, the greatly attenuated CV peak area, the evidently increasedcharge transfer resistance, as well as the decomposition of the quais [Zn₄O(bdc)₃]during cycling, are analyzed to be the main reasonsproviding the ASS-LTO/Li with an evident decay of the electrochemicalperformance in the long-term test of 100 cycles at 1 C. An all-solid-statebattery (denoted as ASS-Gr/Li) that is constructed by a pure graphite electrode(abbreviated as Gr), a wetted quasi [Zn₄O(bdc)₃], and ametallic lithium foil is also prepared in this work. The initial dischargecapacity of ASS-Gr/Li at 0.2 A·g^-1 is about 169 mAh·g^-1,a value evidently lower than the theoretical value of graphite (372 mAh·g^-1).The discharge capacity of ASS-Gr/Li at 1.0 A·g^-1 is about 24 mAh·g^-1,which decreases to about 12 mAh·g^-1 after 100 cycles. Although the batteryperformances of the above two newly developed batteries are poor ascompared to the state-of-the-art all-solid-state lithium batteries reportedrecently, this work sheds light on a novel approach for the further explorationof all-solid-state lithium battery.

Keywords

All-solid-state lithium batteries / Metal-organicframework / [Zn₄O(bdc)₃] / ASS-LTO/Li / ASS-Gr/Li

Author Contributions

Conceptualization, K.D.; Methodology, K.D.; Software, J.B.; Validation, Q.Z., M.N. and W.S.; Formal Analysis, Y.C.; Investigation, Y.C.; Resources, H.W.; Data Curation, Y.C.; Writing—Original Draft Preparation, K.D.; Writing—Review & Editing, K.D. All authors have read and agreed to the published version of the manuscript.

Ethics Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Funding

This research was funded by the Hebei Natural Science Foundation (B2024205035) and Innovation Ability Improvement Project of Hebei province (225A4402D) and The Innovation Capability Improvement Plan Project of Hebei Province (22567604H).

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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