2D Materials for All‐Solid‐State Lithium Batteries

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202108079. Althoughone of the most mature battery technologies, lithium-ion batteries still have many aspects that have not reached the desired requirements, such as energy density, current density, safety, environmental compatibility, and price. To solve these problems, all-solid-state lithium batteries (ASSLB) based on lithium metal anodes with high energy density and safety have been proposed and become a research hotpot in recent years. Due to the advanced electrochemical properties of 2D materials (2DM), they have been applied to mitigate some of the current problems of ASSLBs, such as high interface impedance and low electrolyte ionic conductivity. In this work, the background and fabrication method of 2DMs are reviewed initially. The improvement strategies of 2DMs are categorized based on their application in the three main components of ASSLBs: The anode, cathode, and electrolyte. Finally, to elucidate the mechanisms of 2DMs in ASSLBs, the role of in situ characterization, synchrotron X-ray techniques, and other advanced characterization are discussed.

“Tree‐Trunk” Design for Flexible Quasi‐Solid‐State Electrolytes with Hierarchical Ion‐Channels Enabling Ultralong‐Life Lithium‐Metal Batteries

“…[40,41] After subsequent functionalization, the bond distance of Cu-O1 and Cu abs Cu are slightly increased, confirming the coordination of -PF 6 to the absorber Cu. This is also consistent with the simulation results of electron density difference in Cu-PF 6 , where electrons withdraw toward F to extend the CuO1 and Cu abs Cu bonds (Figure 3e). In a word, the evidence from EXAFS data indicates that the adsorption of PF 6 − on the coordinative vacancy of Cu(II) occurs without breaking the first shell CuO1 bonds, and undergoes an elongation of ≈0.040 Å to connect the PF 6 − group (Table S3, Supporting Information).…”

An Ultrathin, Flexible Solid Electrolyte with High Ionic Conductivity Enhanced by a Mutual Promotion Mechanism

“…As electricity gradually accounts for an increasing share of energy supply, high energy density batteries with high safety performance have gradually become a focus of research. − All-solid-state lithium batteries (ASSLBs), using lithium metals as anodes and solid-state electrolytes (SSEs) as nonflammable electrolytes, can offer higher specific energy densities, longer cycle lives, and better safety than organic lithium batteries. In order to obtain ASSLBs with high energy densities, reducing the thickness of SSEs is imperative. − When the thickness of the SSEs is less than 50 μm, the energy density can be improved remarkedly .…”

A Review of Performance Prediction Based on Machine Learning in Materials Science

“…With the maturation of ML algorithms, significant progress has been made in their integration with the field of materials science, such as in the design of battery materials [ 35 , 36 , 37 , 38 , 39 , 40 ], nanoporous materials [ 41 , 42 , 43 , 44 , 45 , 46 ], etc. Through ML methods, the properties and structures of materials can be predicted quickly and accurately, which has inspired innovation in the design and degradation prediction of high-performance materials.…”