钠金属电池与锂离子电池工作原理相似,具有高比容量(1166 mAh∙g^(−1))和低氧化还原电位(−2.71 V vs.SHE),同时钠元素储量丰富且价格远低于锂,所以有望替代锂离子电池成为最有前景的下一代储能电池。然而,钠金属电池中的钠负极枝晶生长...钠金属电池与锂离子电池工作原理相似,具有高比容量(1166 mAh∙g^(−1))和低氧化还原电位(−2.71 V vs.SHE),同时钠元素储量丰富且价格远低于锂,所以有望替代锂离子电池成为最有前景的下一代储能电池。然而,钠金属电池中的钠负极枝晶生长失控及不稳定的固体电解液界面(SEI)层,限制其发展。从电解液工程优化角度出发,综述了近年来有关钠金属电池电解液优化策略对钠负极保护的研究进展,重点阐述了碳酸酯类电解液及醚类电解液的优化策略。同时,从基础研究和实际应用的角度出发,对钠金属电池电解液工程的发展进程和前景进行了总结及展望。展开更多
In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent den...In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent density of CTCF photoanode is 1.85 m A cm-2 at ＋1.23 V vs. reversible hydrogen electrode（RHE）, which is more than 20 times higher than that of pristine α-Fe2O3 photoanode（0.08 m A cm-2）. The incident-photo-to-current conversion efficiency, applied bias photo-to-current efficiency and transfer efficiency of CTCF photoanode reaches 31.2% at 380 nm（＋1.23 V vs. RHE）,0.11%（＋1.11 V vs. RHE）, 68.2%（＋1.23 V vs. RHE） respectively, which are much higher than those of pristine α-Fe2O3 photoanode. Additionally, the longtime irradiation PEC water splitting of CTCF photoanode demonstrates its high stability at extreme voltage in NaOH（pH 14）.展开更多
文摘钠金属电池与锂离子电池工作原理相似,具有高比容量(1166 mAh∙g^(−1))和低氧化还原电位(−2.71 V vs.SHE),同时钠元素储量丰富且价格远低于锂,所以有望替代锂离子电池成为最有前景的下一代储能电池。然而,钠金属电池中的钠负极枝晶生长失控及不稳定的固体电解液界面(SEI)层,限制其发展。从电解液工程优化角度出发,综述了近年来有关钠金属电池电解液优化策略对钠负极保护的研究进展,重点阐述了碳酸酯类电解液及醚类电解液的优化策略。同时,从基础研究和实际应用的角度出发,对钠金属电池电解液工程的发展进程和前景进行了总结及展望。
基金supported by the National Natural Science Foundation of China(52172202)Guangdong Basic and Applied Basic Research Foundation(2023A1515030163 and 2022A1515010049)the Science and Technology Planning Project of Guangzhou(201605030008).
文摘血氧饱和度已成为继心电图、呼吸和血压后的一项用于健康评价的重要生理参数.本研究中,我们制备出高质量窄带隙三元阳离子Sn-Pb钙钛矿薄膜,该光电薄膜呈现择优的生长晶向,且光吸收截止边拓宽至961 nm.通过双界面层修饰,构建的PPPB(PEDOT:PSS/perovskite/PCBM/BCP)近红外光电探测器展现出增强的光电响应,极快的响应速度(373 ns),宽的线性动态范围(LDR=159 dB),高的比探测率(D*=1.56×10^(11)Jones),以及优异的光响应度(190 mA W^(−1)).基于器件出色的光电性能,我们探索并演示了该探测器在脉搏血氧仪系统中的应用,实现了对不同生理状态下心率和血氧饱和度的准确和非侵入性评估.本研究突显了三元阳离子锡铅钙钛矿光探测器在实时监测血氧饱和度和心率方面的应用潜力.
基金preliminarily supported by the National Natural Science Foundation of China (21706295, 51772135 and 21376104)the Natural Science Foundation of Guangdong Province (2017A030313055 and 2014A030306010Jinan University (11617326 and 88017418)
文摘In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent density of CTCF photoanode is 1.85 m A cm-2 at ＋1.23 V vs. reversible hydrogen electrode（RHE）, which is more than 20 times higher than that of pristine α-Fe2O3 photoanode（0.08 m A cm-2）. The incident-photo-to-current conversion efficiency, applied bias photo-to-current efficiency and transfer efficiency of CTCF photoanode reaches 31.2% at 380 nm（＋1.23 V vs. RHE）,0.11%（＋1.11 V vs. RHE）, 68.2%（＋1.23 V vs. RHE） respectively, which are much higher than those of pristine α-Fe2O3 photoanode. Additionally, the longtime irradiation PEC water splitting of CTCF photoanode demonstrates its high stability at extreme voltage in NaOH（pH 14）.
