2014
DOI: 10.1021/nl503125u
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Ultrathin Two-Dimensional Atomic Crystals as Stable Interfacial Layer for Improvement of Lithium Metal Anode

Abstract: Stable cycling of lithium metal anode is challenging due to the dendritic lithium formation and high chemical reactivity of lithium with electrolyte and nearly all the materials. Here, we demonstrate a promising novel electrode design by growing two-dimensional (2D) atomic crystal layers including hexagonal boron nitride (h-BN) and graphene directly on Cu metal current collectors. Lithium ions were able to penetrate through the point and line defects of the 2D layers during the electrochemical deposition, lead… Show more

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Cited by 687 publications
(503 citation statements)
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“…These electrolyte additives interact with Li quickly and create a protective layer on the Li metal surface, which helps reinforce the SEI (13)(14)(15)(16)(17). Furthermore, recent study in our group has also shown the employment of interconnected hollow carbon spheres (18) and hexagonal boron nitride (19) as mechanically and chemically stable artificial SEI which effectively block Li dendrite growth.…”
mentioning
confidence: 88%
See 1 more Smart Citation
“…These electrolyte additives interact with Li quickly and create a protective layer on the Li metal surface, which helps reinforce the SEI (13)(14)(15)(16)(17). Furthermore, recent study in our group has also shown the employment of interconnected hollow carbon spheres (18) and hexagonal boron nitride (19) as mechanically and chemically stable artificial SEI which effectively block Li dendrite growth.…”
mentioning
confidence: 88%
“…During battery cycling, Li metal is deposited/stripped without a host material. Thus, the whole electrode suffers from a virtually infinite volume change (ratio of Li metal volume at completely charged state versus at the completely discharged state is infinite) compared with the finite volume expansion of several common anodes for lithium ion batteries such as Si (∼400%) (6) and graphite (∼10%) (19). As a result, the mechanical instability induced by the virtually infinite volumetric change would cause a floating electrode/separator interface as well as an internal stress fluctuation (21).…”
mentioning
confidence: 99%
“…The main technological routes have been established ( Figure 3 ): (1) A "hard film" is prepared to block the Li dendrites 18

(2) Li is promoted to react with other materials19 in order to form a targeting "soft film", such as SEI film for the suppression of the Li dendrite growth.

(3) Additives are introduced to electrolyte to postpone/retard the dendrite growth20 or even get a dendrite‐free Li anode 21

…”
Section: Exploration For LI Metal Protectionmentioning
confidence: 99%
“…Hexagonal boron nitride could, therefore, be considered for protection due to its insulating nature, [10][11][12][13] impermeability to small molecules (pore diameter 1.2 Å in the hexagon [14] ), robustness [15] , and transparency. [16] Moreover, it has excellent chemical stability in most aquatic environments.…”
Section: Publication Detailsmentioning
confidence: 99%
“…[3][4][5][6][7] Good shortterm anti-corrosion performance was observed, [3][4][5] but over time, accelerated Cu oxidation and corrosion in air were found in the presence of graphene compared to the bare Cu substrate. [8,9] This acceleration is likely due to the high conductivity that assists electron transfer in the two-component galvanic cell between Cu and graphene, facilitating oxygen reduction and Cu oxidation around the defects in the long run.Hexagonal boron nitride could, therefore, be considered for protection due to its insulating nature, [10][11][12][13] impermeability to small molecules (pore diameter 1.2 Å in the hexagon [14] ), robustness [15] , and transparency. [16] Moreover, it has excellent chemical stability in most aquatic environments.…”
mentioning
confidence: 99%