Yang Hongyu, Li Yu, Long Peng, Han Junkai, Cao Chen, Yao Fengnan, Feng Wei
School of Materials Science and Engineering, Tianjin University Tianjin 300072 P. R. China
Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education Tianjin 300072 P. R. China.
RSC Adv. 2018 May 11;8(31):17325-17333. doi: 10.1039/c8ra02370k. eCollection 2018 May 9.
Amorphous red phosphorus/pyrolyzed bacterial cellulose (P-PBC) free-standing films are prepared by thermal carbonization and a subsequent vaporization-condensation process. The distinctive bundle-like structure of the flexible pyrolyzed bacterial cellulose (PBC) matrix not only provides sufficient volume to accommodate amorphous red-phosphorus (P) but also restricts the pulverization of red-P during the alternate lithiation/delithiation process. When the mass ratio of raw materials, red-P to PBC, is 70 : 1, the free-standing P-PBC film anode exhibits high reversible capacity based on the mass of the P-PBC film (1039.7 mA h g after 100 cycle at 0.1C, 1C = 2600 mA g) and good cycling stability at high current density (capacity retention of 82.84% after 1000 cycles at 2C), indicating its superior electrochemical performances.
通过热碳化和随后的蒸发-冷凝过程制备了非晶态红磷/热解细菌纤维素（P-PBC）自支撑膜。柔性热解细菌纤维素（PBC）基质独特的束状结构不仅提供了足够的体积来容纳非晶态红磷（P），而且在交替的锂化/脱锂过程中限制了红磷的粉碎。当原料红磷与PBC的质量比为70∶1时，基于P-PBC膜质量，自支撑P-PBC膜阳极表现出高可逆容量（在0.1C下100次循环后为1039.7 mA h g，1C = 2600 mA g），并且在高电流密度下具有良好的循环稳定性（在2C下1000次循环后容量保持率为82.84%），表明其具有优异的电化学性能。
