Abstract
Lithium metal is a promising anode material with extremely high theoretical specific capacity (3,860 mA h g−1), low density (0.59 g cm−3), and the lowest negative electrochemical potential of all potential candidates (−3.04 V vs. the standard hydrogen electrode). However, uncontrollable Li dendrite growth leads to a short lifespan and catastrophic safety hazards, which has restricted its practical application for many years. Some effective strategies have been adopted regarding these challenges, including electrolyte modification, introducing a protective layer, nanostructured anodes, and membrane modification. Carbon-based materials have been demonstrated to significantly address the challenge of Li dendrites. In this review, carbon-based materials and their application and challenges in lithium metal anode protection have been discussed in detail. In addition, the applications of lithium anodes protected by carbon-based materials in Li-S batteries and Li-O2 batteries have been summarized.
Highlights
A Review of Carbon-Based Materials for Safe Lithium Metal AnodesYan Liu 1,2, Xifei Li * 1,2,3 , Linlin Fan 1,2, Shufeng Li 1*, Hirbod Maleki Kheimeh Sari 1,2 and Jian Qin 1,2
Environmental pollution has become a serious issue, and green energies, including batteries, rechargeable lithium-metal batteries, have received extensive attention from researchers
It is found that when the deposition capacity and current density are increased, the voltage hysteresis of the N-doped graphene electrode is not meaningful, but the dendrite growth is severe after 127 cycles, piercing the separator, leading to battery short-circuit (Figure 8F)
Summary
Yan Liu 1,2, Xifei Li * 1,2,3 , Linlin Fan 1,2, Shufeng Li 1*, Hirbod Maleki Kheimeh Sari 1,2 and Jian Qin 1,2. Sari H and Qin J (2019) A Review of Carbon-Based Materials for Safe Lithium Metal Anodes. Lithium metal is a promising anode material with extremely high theoretical specific capacity (3,860 mA h g−1), low density (0.59 g cm−3), and the lowest negative electrochemical potential of all potential candidates (−3.04 V vs the standard hydrogen electrode). Some effective strategies have been adopted regarding these challenges, including electrolyte modification, introducing a protective layer, nanostructured anodes, and membrane modification. Carbon-based materials have been demonstrated to significantly address the challenge of Li dendrites. Carbon-based materials and their application and challenges in lithium metal anode protection have been discussed in detail. The applications of lithium anodes protected by carbon-based materials in Li-S batteries and Li-O2 batteries have been summarized
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