A review for modified Li composite anode: Principle, preparation and challenge

Abstract

As the most common energy storage technology on the market, lithium-ion batteries are widely used in various industries and have a profound impact on our daily lives, with the characteristics of high voltage, high capacity, good safety performance, and long cycle life. Lithium metal was first used in the anode of lithium-ion batteries. However, the inherent growth of lithium dendrites and the instability of the SEI film limit the practical application of lithium metal materials. Despite this, lithium metal is still an ideal anode material to meet the growing demands for electronic equipment and electric vehicles due to its extremely high theoretical specific capacity, low density, and the lowest negative electrochemical potential. With the urgent need to develop new energy storage technologies, the research on lithium metal anodes has once again received extensive attention. In this review, the research progress in the modification of composite lithium metal electrode materials is summarized, including lithium/alloy composite electrode, lithium/carbon-based materials composite electrode and artificial SEI film. The possible directions for future development of lithium metal electrode are also prospected.

Carbon/Lithium Composite Anode for Advanced Lithium Metal Batteries: Design, Progress, In Situ Characterization, and Perspectives

“…After a few years of development, researchers have designed various lithiophilic and flexible carbon-based materials to fabricate carbon/Li composite anodes by thermal infiltration method. [6,51,52] At the same time, this method is the mainstream for preparing carbon/Li composite anodes.…”

“…However, with the increasing demand for mobile electronic devices, household devices, electric vehicles, etc., LIBs with present energy density and power densities cannot fulfill all their requirements simultaneously. [ 5,6 ] The high energy density demand of next‐generation batteries for electric vehicles and power grid (>350 W h kg −1 ) has far exceeded the limit of traditional LIBs with graphite as anode. [ 7,8 ] Therefore, Li metal anode (LMA) is considered as a competitive candidate for next generation LIBs (as Li metal batteries (LMBs)) for its lowest negative potential (−3.04 V vs the standard hydrogen electrode) and ultra‐high theoretical specific capacity (3860 mA h g −1 ).…”

Does Cell Polarization Matter in Single-Ion Conducting Electrolytes?

“…Beyond the design of the Li anode itself, including utilization of so-called Li alloys that are less reactive toward the electrolyte and inhibit the growth of high surface area Li deposits 67 or 3D host structures that accommodate Li metal and minimize volume changes of the electrode, 68 subsequently, continuous damage and reconstruction of the SEI (that in turn continuously consumes electrolyte compounds) might be considered. A combinatorial approach, applying both a lithium-ion host material and an artificial SEI, might be additionally envisioned to successfully address the issues of volumetric changes and surface protection of the anode simultaneously.…”

Crystal structure of Li2CuGa and LiCu2Ga compounds

“…Сплави літію надалі залишаються перспективними матеріалами для анодів хімічних джерел струму [2], тому пошук нових літійвмісних інтерметалічних фаз та вивчення їх кристалічної структури були завданням нашого дослідження.…”