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| 1 | FeSb@N-doped carbon quantum dots anchored in 3D porous N-doped carbon with pseudocapacitance effect enabling fast and ultrastable potassium storage显示文摘Potassium-ion batteries(PIBs)are promising ne15t-generation energy storage candidates due to abundant resources and low cost.Sb-based materials with high theoretical capacity(660 mAh·g^(-1))and low working potential are considered as promising anode for PIBs.The remaining challenge is poor stability and slow kinetics.In this work,FeSb@N-doped carbon quantum dots anchored in three-dimensional(3D)porous N-doped carbon(FeSb@C/Nc3DC/N),a Sb-based material with a particular structure,is designed and constructed by a green salt-template method.As an anode for PIBs,it exhibits extraordinarily high-rate and long-cycle stability(a capacity of 245 mAh·g^(-1) at 3,080 mAh·g^(-1) after 1,000 cycles).The pseudocapacitance contribution(83%)is demonstrated as the origin of high-rate performance of the FeSb@C/NС3DC/N electrode.Furthermore,the potassium storage mechanism in the electrode is systematically investigated through ex-situ characterization techniques including ex-situ transmission electron microscopy(TEM)and X-ray photoelectron spectroscopy(XPS).Overall,this study could provide a useful guidance for future design of high-performance electrode materials for PIBs. | Zhihui Li Qingmeng Gan Yifan Zhang Jing Hu Peng Liu Changhong Xu Xibing Wu Yilin Ge Feng Wang Qingrong Yao Zhouguang Lu Jianqiu Deng | 2022 | Nano Research2022，15，1： | 0 |
| 2 | 双碳源制备高性能Na3V2(PO4)3/C正极材料显示文摘以聚丙烯酸和葡萄糖为双碳源,通过碳热还原法制备颗粒分散性良好的Na3V2(PO4)3/C复合材料。借助聚丙烯酸长链分子对原料前驱体的良好分散性和葡萄糖热解碳的高导电性,获得的Na3V2(PO4)3/C作为钠离子电池正极材料,表现出高的倍率放电容量和长循环寿命。在5C倍率下循环1000次后放电容量剩余101 m Ah·g-1,容量保持率为92.6%。本文的双碳源策略为制备高性能电极材料提供了一个可行的途径。 | 李娇娇 刘晓玉 王飞 | 2020 | 广东化工2020，47，15： | 0 |
| 3 | 聚乙二醇辅助制备高性能钠离子电池Na_(3)V_(2)(PO_(4))_(3)/C正极材料显示文摘以碳酸钠、磷酸二氢铵和五氧化二钒为原料,草酸为还原剂,聚乙二醇为表面活性剂,通过两步法制备Na_(3)V_(2)(PO_(4))_(3)/C复合材料。研究不同分子量的聚乙二醇对材料晶体结构、颗粒尺寸、表面包覆碳层厚度和电化学性能的影响。结果表明,随着聚乙二醇分子量的增加材料颗粒团聚程度逐渐减小,颗粒表面包覆碳层厚度逐渐增大。其中以平均分子量为4000的聚乙二醇制备的Na_(3)V_(2)(PO_(4))_(3)/C表现出最好的倍率性能和循环稳定性,10C倍率下放电容量达到105 mA hg^(-1),循环1000次后容量保持率为85%。 | 汪燕鸣 徐晓宁 李娇娇 王飞 | 2021 | 池州学院学报2021，35，3： | 0 |
| 4 | Vertical graphene nanosheetsmodiBed Al current collectors for high-performance sodium-ion batteries显示文摘Rechargeable sodium-ion batteries(SIBs)are promising candidates for large-scale energy storage owing to their excellent high-power performance.However,Al-based current collectorsat both anodes and cathodes of SIBs,which widely influence the power properties of a variety of electrodes in SIBs,have rarely been investigated.Here,we demonstrate that vertical graphene nanosheets grown on commercial Al foil by the plasma-enhanced chemical vapor deposition(PECVD)method,form a robust connection with the carbon-based conductive network of the electrode,thereby significantly reducing the electrode current collector interfacial resistance.For sodium vanadium phosphate(NVP)anodes with vertical graphenenanosheetmodified Al foil(G-AI)current collectors,the interfacial resistance between the electrode and current collector is reduced 20-fold compared with that in the case of Al foil.The G-AI current collector reduces the polarization and improves the rate capability compared with that of Al current collectors within both cathodes and anodes of SIBs.At a high rate of 5 C,the capacity retention of NVP cathode with G-AI current collector is 74%,which is much higher than that with AI foil(22%).We believe that the obtained results support the prospect for the widespread use of G-AI current collectors in the further improvement of high-power profiles of SIBs. | Kexin Wang Chongzhen Wang Hao Yang Xiongbiao Wang Feng Cao Qinci Wu Hailin Peng | 2020 | Nano Research2020，13，7： | 0 |
| 5 | 钠离子电池磷基聚阴离子型正极材料研究进展显示文摘近年来,锂元素资源的大量消耗以及锂资源价格的强劲上涨,导致锂离子电池的应用受到一定限制。与锂离子电池具有相同工作原理和相似电池构件的钠离子电池迎来了大好的发展机遇,引起了诸多研究人员的广泛关注。聚阴离子型化合物具有电压平台高而稳定、结构多样且稳定、Na+扩散速度快等优点,已成为钠离子电池正极材料领域的研究热点。然而,庞大的阴离子基团导致聚阴离子型化合物的电子电导率低,进而影响了其比容量和倍率性能等参数指标。在聚阴离子型材料中研究最多的是磷基聚阴离子型材料。本文综述了磷基聚阴离子型正极材料的研究现状,重点阐述了材料的晶体结构和其电化学性能之间的关系、元素掺杂和取代、碳包覆以及正极材料纳米化的改性策略等。 | 李瑞 何祥飞 郭美卿 徐利春 郭春丽 | 2023 | 长沙理工大学学报(自然科学版)2023，20，3： | 0 |
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