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| 1 | Black Phosphorus/Nanocarbons Constructing a Dual-Carbon Conductive Network for High-Performance Sodium-Ion Batteries显示文摘Black phosphorus has been recognized as a prospective candidate anode material for sodium-ion batteries(SIBs)due to its ultrahigh theoretical capacity of 2596 mA·h/g and high electric conductivity of≈300 S/m.However,its large volume expansion and contraction during sodiation/desodiation lead to poor cycling stability.In this work,a BP/graphite nanoparticle/nitrogen-doped multiwalled carbon nanotubes(BP/G/CNTs)composite with a dual-carbon conductive network is successfully fabricated as a promising anode material for SIBs through a simple two-step mechanical milling process.The unique structure can mitigate the eff ect of volume changes and provide additional electron conduction pathways during cycles.Furthermore,the formation of P–O–C bonds helps maintain the intimate connection between phosphorus and carbon,thereby improving the cycling and rate performance.As a result,the BP/G/CNTs composite delivers a high initial Coulombic efficiency(89.6%)and a high specific capacity for SIBs(1791.3 mA·h/g after 100 cycles at 519.2 mA/g and 1665.2 mA·h/g after 100 cycles at 1298 mA/g).Based on these results,the integrated strategy of one-and two-dimensional carbon materials can guide other anode materials for SIBs. | Leping Dang Jiawei He Hongyuan Wei | 2022 | Transactions of Tianjin University2022，28，2： | 0 |
| 2 | 黑磷量子点的低温电化学辅助制备及稳定性研究显示文摘采用低温电化学阳极剥离黑磷的方法,剥离1h制备出黑磷量子点,并研究了其稳定性,最终提出剥离机理。采用透射电镜、拉曼光谱、X射线光电子能谱等测试方法对黑磷量子点的微观形貌、晶体结构、光学性质和稳定性等进行表征。结果表明,黑磷量子点的平均直径为6.4±1.5 nm,尺寸较小;材料不含有其他杂质,纯度较高;其氧化程度很低,暴露于空气中仍具有良好的稳定性。此外,该方法耗时短且绿色环保,有利于促进纳米黑磷的制备及应用。 | 付姣 卢秋菊 曹昌蝶 梅毅 廉培超 | 2022 | 化工新型材料2022，50，4： | 0 |
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