Sul Ki Park

1 Introduction The growing use of electric vehicles and new electronic devices imposes increasingly stringent demands on Li-ion batteries (LiBs), driving the need for the development of higher-energy-density solutions. The vast majority of commercial LiBs are still relying on graphite anodes, similar to those commercialized over 30 years ago. While graphite achieves a decent capacity (LiC6, 372 mAh g−1),[1-3] new anodes have been proposed with much improved performance.

Introduction Click to copy section linkSection link copied! The increasing prevalence of Li-ion batteries (LIBs) in various applications, from consumer electronics to electric vehicles, demands continuous improvements in LIB energy and power density. (1−3) In pursuit of higher volumetric energy density, researchers are focusing on two primary strategies: the development of LIB materials with inherently higher energy density and the more efficient utilization of existing materials.

1. Jiang, J.-W. & Park, H. S. Negative Poisson’s ratio in single-layer black phosphorus. Nat. Commun. 5, 4727 (2014). 2. Cai, Y., Zhang, G. & Zhang, Y.-W. Layer-dependent band alignment and work function of few-layer phosphorene. Sci. Rep. 4, 6677 (2014). 3. Ling, X. et al. Low-frequency interlayer breathing modes in few-layer black phosphorus. Nano Lett. 15, 4080–4088 (2015). 4. Reich, E. S. Phosphorene excites materials scientists. Nature 506, 19 (2014). 5. Chhowalla, M. et al.