Guiding lithium deposition in tent-like nitrogen-doped porous carbon microcavities for stable lithium metal anodes. Issue 27 (2nd July 2020)

• Record Type: Journal Article
• Authors: Gan, He; Wu, Jing; Chen, Hui; Li, Run; Liu, Hongbo
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 27(2020)
• Page Start: 13480
• Page End: 13489
• Publication Date: 2020-07-02
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta04784h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Tent-like nitrogen-doped carbon microcavities are elaborately designed to guide uniform lithium deposition towards stable lithium metal anodes with superior performance. Abstract : Lithium metal anodes, acting as a competitive candidate for the construction of high-energy-density rechargeable batteries, have drawn tremendous attention in both academia and industry. However, the uncontrollable growth of lithium dendrites and dramatic volume changes during lithium plating/stripping prevent their practical application. In this work, we demonstrate tent-like nitrogen-doped porous carbon microcavities decorated on carbon cloth (NPCM@CC) which could guide the Li ion flux, reduce the nucleation overpotential and decrease local current density, thus regulating the nucleation and growth behavior of metallic lithium. Consequently, the assembled cells based on NPCM@CC display remarkable electrochemical performances as reflected by an extremely high coulombic efficiency (99.1% at 4 mA h cm −2 ), excellent long-term cycling stability (over 4200 and 1200 h at 1 and 2 mA cm −2, respectively), and an ultralow overpotential value of 46 mV at a current density up to 10 mA cm −2 .