Lithium Batteries with Nearly Maximum Metal Storage.
basic_science · Level V
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- Record sourced from PubMed, PMID 28511004.
- Also identified by DOI 10.1021/acsnano.7b02731.
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Abstract
The drive for significant advancement in battery capacity and energy density inspired a revisit to the use of Li metal anodes. We report the use of a seamless graphene-carbon nanotube (GCNT) electrode to reversibly store Li metal with complete dendrite formation suppression. The GCNT-Li capacity of 3351 mAh g<sup>-1</sup><sub>GCNT-Li</sub> approaches that of bare Li metal (3861 mAh g<sup>-1</sup><sub>Li</sub>), indicating the low contributing mass of GCNT, while yielding a practical areal capacity up to 4 mAh cm<sup>-2</sup> and cycle stability. A full battery based on GCNT-Li/sulfurized carbon (SC) is demonstrated with high energy density (752 Wh kg<sup>-1</sup> total electrodes, where total electrodes = GCNT-Li + SC + binder), high areal capacity (2 mAh cm<sup>-2</sup>), and cyclability (80% retention at >500 cycles) and is free of Li polysulfides and dendrites that would cause severe capacity fade.