02738nas a2200289   4500008004100000022001400041245016500055210006900220260000800289300001100297490000700308520168400315653002501999653003302024653002402057653004502081653003402126653002702160100002002187700002202207700001902229700001702248700002202265700002602287700000502313856013002318       2023                        eng d  a2352-152X00aHigh rate, high temperature, dendrite free plating/stripping of Li in 3-dimensional honeycomb boron carbon nitride to realize an ultrastable lithium metal anode0 aHigh rate high temperature dendrite free platingstripping of Li   cSEP  a1075470 v683 a<p>
	Lithium (Li) metal could be the anode of choice for energy dense Li-batteries owing to its high theoretical specific capacity. However, low coulombic efficiency and poor safety on account of the occurrence of the Li-dendrites during charging-discharging pose a bottleneck for practical applications. In this work, we report a high-rate plating and stripping of Li through host engineering to realize ultrastable Li metal anode (LMA). Benchmark plating/stripping efficiency could be achieved via uniquely structured, highly ordered honeycomb boron carbon nitride (HBCN) as a functional scaffold. Boron and nitrogen doping, large surface area and ordered mesoporous structure induce homogeneous solid electrolyte interface (SEI) layer formation and provide numerous nucleation sites with subsequent dendrite-free growth with 99.98 % coulombic efficiency at 8 mA cm(-2) high current and 10 mAh cm(-2) capacity over 3000 cycles. Via post-cycling advanced characterizations techniques of Ex-situ XPS, 3D X-ray micro-tomography analyses and FESEM, we demonstrate the formation of a stable SEI layer and morphological changes that occurred during Li plating cycles in the HBCN structure. Computational studies validate the high lithium plating-stripping efficacy of HBCN to its highly ordered porous nature, exothermic Li-binding and upshift in the Fermi levels. When tested at elevated temperature (50 degrees C), a stable Li plating-stripping in HBCN is realised at 4 mA cm(-2) current and 10 mAh cm(-2) capacity values with similar to 100 % C.E. Furthermore, we report the results of testing a Li metal cell comprised of Li deposited HBCN anode and LiFePO4 (LFP) cathode.</p>
10aBoron carbon nitride10aDendrite-free Li metal anode10aFunctional scaffold10aHigh temperature plating/stripping of Li10aMolecular planarity parameter10aX-ray micro-tomography1 aPatrike, Apurva1 aKarbhal, Indrapal1 aWasnik, Kundan1 aTorris, Arun1 aMaibam, Ashakiran1 aKrishnamurty, Sailaja1 a  uhttps://library.ncl.res.in/content/high-rate-high-temperature-dendrite-free-platingstripping-li-3-dimensional-honeycomb-boron