Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 8, Issue 35, Pages 18348-18357Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta06141g
Keywords
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Funding
- National Natural Science Foundation of China [51872157]
- Dongguan Core Technology Key Funding Project [2019622119003]
- Shenzhen Key Laboratory on Power Battery Safety Research [ZDSYS201707271615073]
- Shenzhen Technical Plan Project [KQJSCX20160226191136, JCYJ20170412170911187, JCYJ20170817161753629]
- Special Fund Project for Strategic Emerging Industry Development of Shenzhen [20170428145209110]
- Guangdong Technical Plan Project [2015TX01N011, 2017B090907005]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01N111]
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Lithium metal is one of the most promising anode materials for next-generation batteries. However, the growth of lithium dendrites and the high reactivity of lithium cause serious safety and cyclability problems. A comprehensive understanding of the lithium deposition behavior, especially during the initial deposition stages, is critical for its performance improvement. The influences of current density and capacity on the nucleation size, site distribution, and growth pattern were discussedvia in situelectrochemical AFM (EC-AFM) and COMSOL simulation, suggesting that lithium deposition initially follows reaction- and then transport-limited mechanisms. In addition, the solid electrolyte interface (SEI) during lithium deposition was systematically analyzed by conductive-AFM, AFM force probing and X-ray photoelectron spectroscopy (XPS) depth profiling to give a comprehensive picture of the electronic, mechanical and chemical properties of SEI film under realistic conditions.
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