An Air-Stable Densely Packed Phosphorene-Graphene Composite Toward Advanced Lithium Storage Properties

作者：Zhang, Yu; Wang, Huanwen; Luo, Zhongzhen; Tan, Hui Teng; Li, Bing; Sun, Shengnan; Li, Zhong; Zong, Yun; Xu, Zhichuan J.; Yang, Yanhui; Khor, Khiam Aik; Yan, Qingyu^*

来源：Advanced Energy Materials, 2016, 6(12): 1600453.

DOI：10.1002/aenm.201600453

• FIELD-EFFECT TRANSISTORS
• LIQUID-PHASE EXFOLIATION
• LAYER BLACK PHOSPHORUS
• SODIUM-ION BATTERIES
• ANODE MATERIAL
• ELECTROCHEMICAL ACTIVITY
• SOLVENT EXFOLIATION
• NANOSHEETS
• TRANSPORT
• HYBRID

Phosphorene, monolayer or few-layer black phosphorus (BP), has recently triggered strong scientific interest for lithium/sodium ion batteries (LIBs/SIBs) applications. However, there are still challenges regarding large-scale fabrication, poor air stability. Herein, we report the high-yield synthesis of phosphorene with good crystallinity and tunable size distributions via liquid-phase exfoliation of bulk BP in formamide. Afterwards, a densely packed phosphorene-graphene composite (PG-SPS, a packing density of 0.6 g cm(-3)) is prepared by a simple and easily up-scalable spark plasma sintering (SPS) process. When working as anode materials of LIBs, PG-SPS exhibit much improved first-cycle Coloumbic efficiency (60.2%) compared to phosphorene (11.5%) and loosely stacked phosphorene-graphene composite (34.3%), high specific capacity (1306.7 mAh g(-1)) and volumetric capacity (256.4 mAh cm(-3)), good rate capabilities (e.g., 415.0 mAh g(-1) at 10 A g(-1)) as well as outstanding long-term cycling life (91.9% retention after 800 cycles at 10 A g(-1)). Importantly, excellent air stability of PG-SPS over the 60 days observation in maintaining its high Li storage properties can be achieved. On the contrary, 95.2% of BP in PG sample was oxidized after only 10 days exposure to ambience, leading to severe degradation of electrochemical properties.

• 出版日期2016-6-22
• 单位南阳理工学院