Modified lithium metal anodeviaanion-planting protection mechanisms for dendrite-free long-life lithium metal batteries

Abstract

Lithium metal anodes (LMAs) are struggling to revive and redeem their talents as ideal candidates for high-energy-density rechargeable batteries. However, an unstable solid electrolyte interphase (SEI) layer and dendrites formation...

A Non‐Expendable Leveler as Electrolyte Additive Enabling Homogenous Lithium Deposition

“…As shown in Figure 5c, the obvious anodic peak at 2.8 V can be ascribed to the oxidation of Li + ‐DMP, whereas the cathodic peaks at 1.7, 1.5, and 0.7 V should be attributed to the reduction of salt anions and solvents. [ 6a,26,27 ] The subsequent scans (Figure S22, Supporting Information) in cells with DCE exhibited good overlap, indicating that there were not many redundant reactions for sustained electrolyte decomposition. These experimental results were validated by theoretical results.…”

Synergistic regulation of Li deposition on F-doped hollow carbon spheres toward dendrite-free lithium metal anodes

“…15,16 However, the formation of LiF originates from the reaction between anions (PF 6 − /TFSI − ) and metallic Li, inducing a rapid consumption of the electrolyte. 17,18 Extensive efforts, such as developing high-concentration electrolytes (HCEs), local high-concentration electrolytes (LHCEs), and adding fluorinated additives, have been explored to prolong battery lifetime. [19][20][21] The depositing behavior of Li is another key parameter to determine a stable Li metal anode.…”

Constructing TiO2 nanotube arrays with oxygen vacancies on a Cu mesh to enable homogeneous Li deposition towards a long-life Li metal anode

“…Due to the non-host property of the lithium metal, it is difficult to control the deposition morphology of Li during the repeated plating/stripping process, 5,6 which leads to the change of internal stress and the instability of the interface. 7,8 Once the solid electrolyte interface (SEI) layer breaks, it will make fresh Li and electrolyte contact directly. This process will be repeated, which will lead to additional electrolyte consumption and Li passivation, resulting in the accumulation of dead Li, low coulombic efficiency (CE), continuous capacity decay and short cycle life.…”