Rui Zhou,Jun Li,Hongwei Jiang,Hui Li,Yao Wang,Danick Briand,Malick Camara,Guofu Zhou,Nico F. de Rooij
A highly transparent humidity sensor has been developed on ITO patterned glass substrate. The fabrication included coating the fluoropolymer insulating layer and cellulose acetate butyrate sensing layer on the ITO interdigitated electrode arrays by screen printing process. The transmittance in the visible band and the capacitive response to the relative humidity ranging from 0% to 90% of the printed sensors were tested experimentally. The fabricated sensors showed a high transparency of 90.74%–92.29% and a linearity of 0.96 of capacitance response to relative humidity in the range of 0%–90%. Fabricated by the low-cost screen printing process which is widely used in display industry, the transparent sensors showed a great application prospect to be integrated on displays in smart devices.
Electroactive organics with multiple redox centers have advantage to realize high capacity and energy density of lithium-ion batteries (LIBs). Herein, a novel multiredox organic molecule, viz . 2,4,6-tri(4-pyridyl)-1,3,5-triazine (TPT), is developed by densely assembling active sites in one molecule, which yields reversible four-electron storage and a high capacity of 347 mA h g −1 TPT at 0.10 A g −1 in carbonate electrolyte. Battery test reveals a superior cyclability with a capacity retention of 66% after 6000 cycles at 2.0 A g −1 and rate performance. Physiochemical characterizations and theoretical calculation are extensively performed to clarify the superior capacity and stability. Physicochemical characterizations reveal that the TPT evolves to diradicals upon accepting two electrons, and the quinoid structure upon accepting four electrons. The effective delocalization of the four charge over the four aromatic rings can remarkably stabilize the organic molecule against side reactions. The formation of a cathode electrolyte interface film contributes to the high cyclability during the battery test. The capacitive response of TPT is recognized as the dominant proportion in capacity, which contributes to the superior rate performance. This work offers an effective strategy on the rational design of high-capacity and stable organic cathode materials for LIBs.
危险品化学品经营许可证（带存储）