Alloy‐Type Anodes for High‐Performance Rechargeable Batteries

Abstract

Alloy‐type anodes are one of the most promising classes of next‐generation anode materials due to their ultrahigh theoretical capacity (2–10 times that of graphite). However, current alloy‐type anodes have several limitations: huge volume expansion, high tendency to fracture and disintegrate, an unstable solid–electrolyte interphase (SEI) layer, and low Coulombic efficiency. Efforts to overcome these challenges are ongoing. This Review details recent progress in the research of batteries based on alloy‐type anodes and discusses the direction of their future development. We conclude that improvements in structural design, the introduction of a protective interface, and the selection of suitable electrolytes are the most effective ways to improve the performance of alloy‐type anodes. Furthermore, future studies should direct more attention toward analyzing their synergistic promoting effect.

Emerging strategies for steering orientational deposition toward high-performance Zn metal anodes

“…As Zn electroplates directly on the top of the artificial SEI, such an SEI layer functions as a support to uphold Zn deposition, which is normally in tight contact with the Zn electrode to gain rapid electron transport. [108][109][110][111][112][113] Meanwhile, a dendrite-free anode is achievable once this layer enables orientational Zn deposition. As depicted in Fig.…”

Armor‐like Inorganic‐rich Cathode Electrolyte Interphase Enabled by the Pentafluorophenylboronic Acid Additive for High‐voltage Li||NCM622 Batteries

“…The common strategies for improving the stability of high‐voltage cathodes are doping, constructing artificial cathode electrolyte interphase, and electrolyte engineering [15–19] . Among them, electrolyte engineering is more effective and economical by inducing cost‐effective solvents or additives into conventional carbonate electrolytes [20–22] . Some high‐voltage additives such as sulfones, ionic liquids, and dinitriles have demonstrated positive effects in suppressing oxidation loss and forming stable, highly Li + conductive CEI at high cut‐off voltages above 4.5 V [23–26] .…”

Novel Ni–Ge–P anodes for lithium-ion batteries with enhanced reversibility and reduced redox potential

“…[5][6][7] Therefore, designing novel electrode materials, especially anode materials, with superior electrochemical performance to replace the capacity-limited graphite and Li 4 Ti 5 O 12 anodes is significant. [8][9][10] Among various anode materials, transitionmetal phosphides (M x P y ), such as Ni 2−x Co x P, 11 FeP, 12,13 MnP 4 , 14 VP 2 , 15 TiP 2 , etc., 16 have been extensively studied due to their great phase diversity, large theoretical specific capacities, and high electronic conductivity. 17,18 However, these M x P y anodes also face challenges, such as large volume expansions, sluggish Li diffusion kinetics, and poor reversibility, which inevitably hinder their practical applications.…”