Composite‐Structure Material Design for High‐Energy Lithium Storage

Abstract

High-energy storage devices are in demand for the rapid development of modern society. Until now, many kinds of energy storage devices, such as lithium-ion batteries (LIBs), sodium-ion batteries (NIBs), and so on, have been developed in the past 30 years. However, most of the commercially exploited and studied active electrode materials of these energy storage devices possess a single phase with low reversible capacity or unsatisfied cycle stability. Continuous and extensive research efforts are made to develop alternative materials with a higher specific energy density and long cycle life by element doping or surface modification. A novel strategy of forming composite-structure electrode materials by introducing structure units has attracted great attention in recent years. Herein, based on previous publications on these composite-structure materials, some important scientific points focusing on the design of composite-structure materials for better electrochemical performances reveal the distinction of composite structures based on average and local structure analysis methods, and an understanding of the relationship between these interior composite structures and their electrochemical performances is discussed thoroughly. The lithiation/delithiation mechanism and the remaining challenges and perspectives for composite-structure electrode materials are also elaborated.

A High-Capacity Ammonium Vanadate Cathode for Zinc-Ion Battery

“…Furthermore, an outstanding power density of 6.9 kW kg −1 (corresponding energy density: 90 Wh kg −1 ) can also be obtained. These results pass significantly beyond most advanced ZIB cathodes such as VS 2 [37], V 2 O 5 [25], LiV 3 To understand the electrochemical Zn 2+ ion storage kinetics of 3D-NVO cathode, cyclic voltammetry (CV) was performed under scan rates of 0.1-1.0 mV s −1 (Fig. 3f).…”

“…Battery technologies are the key to delivering significant advances in a wide range of industries, from portable electronics and electric vehicles to renewable power [1][2][3][4][5]. Given the looming concerns over the availability and safety hazards of lithium resources, rechargeable zinc-ion batteries (ZIBs) are relatively abundant in resources and environmental benign as compared to alkaline metals.…”

Layer‐Based Heterostructured Cathodes for Lithium‐Ion and Sodium‐Ion Batteries

“…Crystalline structure of a) R m trigonal layer; b) C 2/ m monoclinic layer; c) Fd m cubic spinel. Reproduced with permission . Copyright 2018, Wiley‐VCH.…”

“…Crystal structural properties are known to heavily influence electrochemical behavior of cathode materials, and it has been discovered that rational modification of crystal structure can be utilized to optimize performance of LIBs and SIBs . Recently, cathode materials with layer‐based heterostructures are emerging as alternative candidates for next‐generation LIBs/SIBs owing to their balanced overall electrochemical parameters in reversible capacity, initial coulombic efficiency, cyclic and rate performance.…”

Hybrid Architectures based on 2D MXenes and Low‐Dimensional Inorganic Nanostructures: Methods, Synergies, and Energy‐Related Applications

“…Due to the possibility in forming Lewis acid–base couples, TMOs can effectively inhibit the shutting effect by confining polysulfides through chemisorption. Whereas, in view of their inferior Li + diffusivity and electronic conductivity, TMOs alone are not sufficient as sulfur hosts . On the other hand, MXenes are also employed to host sulfur in Li–S batteries .…”