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| 1 | An integrated portable bio-monitoring system based on tough hydrogels for comprehensive detection of physiological activities显示文摘Advanced soft ion-conducting hydrogels have been developed rapidly in the integrated portable health monitoring equipment due to their higher sensitivity,sensory traits,tunable conductivity,and stretchability for physiological activities and personal healthcare detection.However,traditional hydrogel conductors are normally susceptible to large deformation and strong mechanical stress,which leads to inferior electro-mechanical stability for real application scenarios.Herein,a strong ionically conductive hydrogel(poly(vinyl alcohol)-boric acid-glycerol/sodium alginate-calcium chloride/electrolyte ions(PBG/SC/EI))was designed by engineering the covalently and ionically crosslinked networks followed by the salting-out effect to further enhance the mechanical strength and ionic conductivity of the hydrogel.Owing to the collective effects of the energy-dissipation mechanism and salting-out effect,the designed PBG/SC/EI with excellent structural integrity and robustness exhibits exceptional mechanical properties(elongation at break for 559.1%and tensile strength of 869.4 kPa)and high ionic conductivity(1.618 S·m^(-1)).As such,the PBG/SC/EI strain sensor features high sensitivity(gauge factor=2.29),which can effectively monitor various kinds of human motions(joint motions,facial micro-expression,faint respiration,and voice recognition).Meanwhile,the hydrogel-based Zn||MnO_(2)battery delivers a high capacity of 267.2 mAh·g^(-1)and a maximal energy density of 356.8 Wh·kg^(-1)associated with good cycle performance of 71.8%capacity retention after 8000 cycles.Additionally,an integrated bio-monitoring system with the sensor and Zn||MnO_(2)battery can accurately identify diverse physiological activities in a real-time and non-invasive way.This work presents a feasible strategy for designing high-performance conductive hydrogels for highly-reliable integrated bio-monitoring systems with excellent practicability. | Congcong Yang Chenchen Ji Fengjiao Guo Chunjiang Jin Hongyu Mi Zhongchang Wang | 2024 | Nano Research2024，17，1： | 0 |
| 2 | 聚合物辅助生成焦磷酸铌NbP1.8O7用于钠离子电池负极显示文摘提出一种利用聚合物合成焦磷酸铌NbP1.8O7的简易方法,采用聚合物辅助一步煅烧,通过调控含磷聚合物的加入量来制备纯相的焦磷酸铌,调控煅烧升温速率以进一步提高负极材料的无定型化,考察电极材料的电化学性能。结果表明:优化后的电极材料电化学储钠性能优异;制备5℃/min升温速率下的趋于无定形的焦磷酸铌在1 000 mA/g的电流密度下循环5 000圈后可逆放电比容量仍有164.6 mA·h/g,在2 000 mA/g的大电流密度下循环5 000圈后仍有101.37 mA·h/g的高可逆比容量。 | 李忠涛 吕青 刘涛 邢涛 刘海燕 | 2024 | 中国石油大学学报(自然科学版)2024，48，1： | 0 |
| 3 | Revealing the Catalytic Conversion via in Situ Characterization for Lithium–Sulfur Batteries显示文摘Probing effective strategies to accelerate the transformation of sulfur species and alleviate the accumulation of lithium polysulfides is of profound significance for breaking through the bottlenecks of the intrinsic redox kinetics and shuttle effect of lithium–sulfur batteries(LSBs).Introducing catalysts is regarded as a straightforward approach to reduce the conversion barrier of sulfur species for enhancing the performance of LSBs.However,the catalytic mechanism is elusive due to the time-varying,process-dependent,and enclosed reaction processes.Therefore,monitoring the evolution of catalysts and sulfur species by in situ characterization during the full process of the redox reaction is essential to reveal the kinetics and the mechanism of catalytic conversion,which may promote novel and efficient catalyst design.This review outlines the recent progress of in situ characterization techniques to investigate the catalytic mechanism.We focus on the evaluation of the catalytic effect and clarification of the catalytic mechanism by in situ characterization techniques.In addition,a perspective on improving the in situ characterization methods and linked data analysis are proposed to offer research suggestions in the field. | Qinhua Gu Ming Lu Yiqi Cao Bingsen Zhang | 2023 | Renewables2023，1，6： | 0 |
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