Aqueous zinc metal batteries(AZMBs)have garnered widespread attention due to their low cost and high safety.However,current researches are still primarily focused on reversible cycling at low areal capacity,which is f...Aqueous zinc metal batteries(AZMBs)have garnered widespread attention due to their low cost and high safety.However,current researches are still primarily focused on reversible cycling at low areal capacity,which is far from practical application.Addressing interfacial stability issues encountered during cycling and employing interfacial optimization strategies can promote the development of safe and eco-friendly AZMBs.By introducingγ-valerolactone(GVL),which disrupts the original hydrogen bonding network of water,the electrochemical window of electrolyte is expanded,and the reactivity of water is significantly reduced.Additionally,the incorporation of GVL in Zn ion solvation alters the deposition pattern on the Zn anode surface,resulting in improved cyclic performance.The cells demonstrated excellent performance,maintaining stable over 400 h at 5 mA/cm^(2)-5 mA·h/cm^(2),and nearly 300 h in Zn||Zn symmetric cell at 80%depth of discharge(DOD).The full cells matched with NH_(4)V_(4)O_(10) could cycle over 200 cycles under the condition of high areal capacity(7 mA·h/cm^(2)),an N/P ratio of 1.99 and an E/C ratio of 9.3μL/(mA·h).展开更多
目的:建立栀子HPLC数字化指纹图谱并进行统一化研究。方法:采用反相高效液相色谱法,使用Century SIL C18 BDS柱(20cm×4.6mm,5μm),以1%醋酸水-1%醋酸乙腈为流动相,低压线性梯度洗脱,检测波长265nm,柱温(30.0±0.15)℃,进样量5...目的:建立栀子HPLC数字化指纹图谱并进行统一化研究。方法:采用反相高效液相色谱法,使用Century SIL C18 BDS柱(20cm×4.6mm,5μm),以1%醋酸水-1%醋酸乙腈为流动相,低压线性梯度洗脱,检测波长265nm,柱温(30.0±0.15)℃,进样量5μL,测定10批不同产地栀子HPLC指纹图谱。以色谱指纹图谱指数F和色谱指纹图谱信息量指数I等指标定性、定量评价不同产地栀子药材质量。用方向余弦阐明大峰对相似度的影响,建立了比率定性相似度的消除方法。结果:以栀子苷峰为参照物峰,确定35个共有峰,建立了栀子HPLC数字化指纹图谱和统一化指纹图谱。结论:所建立的指纹图谱具有较好的精密度和重现性,可作为栀子药材质量控制和真伪鉴别的依据。展开更多
基金Project(2023YFC2908305)supported by the National Key R&D Program of ChinaProjects(52072411,52301273)supported by the National Natural Science Foundation of China+1 种基金Project(2023CXQD038)supported by the Central South University Innovation-Driven Research Program,ChinaProject(S202310533413)supported by the Fundamental Research Funds for the Central Universities of Central South University,China。
文摘Aqueous zinc metal batteries(AZMBs)have garnered widespread attention due to their low cost and high safety.However,current researches are still primarily focused on reversible cycling at low areal capacity,which is far from practical application.Addressing interfacial stability issues encountered during cycling and employing interfacial optimization strategies can promote the development of safe and eco-friendly AZMBs.By introducingγ-valerolactone(GVL),which disrupts the original hydrogen bonding network of water,the electrochemical window of electrolyte is expanded,and the reactivity of water is significantly reduced.Additionally,the incorporation of GVL in Zn ion solvation alters the deposition pattern on the Zn anode surface,resulting in improved cyclic performance.The cells demonstrated excellent performance,maintaining stable over 400 h at 5 mA/cm^(2)-5 mA·h/cm^(2),and nearly 300 h in Zn||Zn symmetric cell at 80%depth of discharge(DOD).The full cells matched with NH_(4)V_(4)O_(10) could cycle over 200 cycles under the condition of high areal capacity(7 mA·h/cm^(2)),an N/P ratio of 1.99 and an E/C ratio of 9.3μL/(mA·h).
文摘目的:建立栀子HPLC数字化指纹图谱并进行统一化研究。方法:采用反相高效液相色谱法,使用Century SIL C18 BDS柱(20cm×4.6mm,5μm),以1%醋酸水-1%醋酸乙腈为流动相,低压线性梯度洗脱,检测波长265nm,柱温(30.0±0.15)℃,进样量5μL,测定10批不同产地栀子HPLC指纹图谱。以色谱指纹图谱指数F和色谱指纹图谱信息量指数I等指标定性、定量评价不同产地栀子药材质量。用方向余弦阐明大峰对相似度的影响,建立了比率定性相似度的消除方法。结果:以栀子苷峰为参照物峰,确定35个共有峰,建立了栀子HPLC数字化指纹图谱和统一化指纹图谱。结论:所建立的指纹图谱具有较好的精密度和重现性,可作为栀子药材质量控制和真伪鉴别的依据。
