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Abstract Like phosphorene, phosphorene nanoribbon (PNR) promises exotic properties but unzipping phosphorene into edge‐defined PNR is non‐trivial because of uncontrolled cutting of phosphorene along random directions. Here a facile electrochemical strategy to fabricate zigzag‐edged PNRs in high yield (>80%) is reported. The presence of chemically active zigzag edges in PNR allows it to spontaneously react with Li to form a Li + ion conducting Li 3 P phase, which can be used as a protective layer on Li metal anode in lithium metal batteries (LMBs). PNR protective layer prevents the parasitic reaction between lithium metal and electrolyte and promotes Li + ion diffusion kinetics, enabling homogenous Li + ion flux and long‐time cycling stability up to 1100 h at a current density of 1 mA cm −2 . LiFePO 4 |PNR‐Li full‐cell batteries with an areal capacity of 2 mAh cm −2 , a lean electrolyte (20 µl mAh −1 ) and a negative/positive (N/P) electrodes ratio of 3.5 can be stably cycled over 100 cycles.
Yu et al. (Thu,) studied this question.