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            The propensity of Li to form irregular and nonplanar electrodeposits has
            become a fundamental barrier for fabricating Li metal batteries. Here, a
            planar, dendrite-free Li metal growth on 2D Ti3C2Tx MXene is reported. Ab
            initio calculations suggest that Li forms a hexagonal close-packed (hcp)
            layer on the surface of Ti3C2Tx via ionic bonding and the lattice confinement.
            The ionic bonding weakens gradually after a few monolayers, resulting in a
            nanometers-thin transition region of hcp-Li. Above this transition region, the
            deposition is dominated by plating of body-centered cubic (bcc) Li via metallic
            bonding. Formation of a dense and planar Li metal anode with preferential
            growth along the (110) facet is explained by the lattice matching between
            Ti3C2Tx and hcp-Li and then with bcc-Li, as well as preferred thermodynamic
            factors including the large dendrite formation energy and small migration barrier
            for Li. The prepared Li metal anode shows stable cycling in a wide current
            density range from 0.5 to 10.0 mA cm–2. The LiFePO4‖Li full cell fabricated
            with this Li metal anode exhibits only 9.5% capacity fading after 500 charge–
            discharge cycles at 1 C rate.

            影響因子
            18.808
            論文下載
            作者

            Di Yang,Chunyu Zhao,Ruqian Lian,Lin Yang,Yizhan Wang,Yu Gao,Xu Xiao,Yury Gogotsi,Xudong Wang,Gang Chen,Yingjin Wei.

            期刊

            Advanced Functional Materials,31:24,2010987(2021)

            年份
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