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Interconnected and high cycling stability polypyrrole supercapacitors using cellulose nanocrystals and commonly used inorganic salts as dopants

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Journal of Energy Chemistry 2023年第1期76卷 165-174,I0005页

作者： Zuxin Sun wim Thielemans Sustainable Materials Lab Department of Chemical EngineeringKU LeuvenCampus Kulak KortrijkEtienne Sabbelaan 538500 KortrijkBelgium

Polypyrrole(PPy)is wildly used as electrode material in supercapacitors due to its high conductivity,low cost,ease of handling,and ease of ***,limited capacitance and poor cycling stability hinder its practical *** developing carboxylated cellulose nanocrystals(CNC-COO^(-))as immobile dopants for PPy to improve its cycling stability,we investigated the effect of different commonly used salts(KCl,NaCl,KBr,and NaClO_(4))as dopants during electrode fabrication by *** film’s capacitance increased from 160.6 to 183.4 F g^(-1)after adding a combination of KCl and NaClO_(4) into the electrodeposition *** importantly,the porous and interconnected PPy/CNC-COO^(-)-Cl-(Cl O_(4)^(-))_0.5 electrode film exhibited an excellent capacitance of 125.0 F g^(-1)(0.78 F cm^(-2))at a high current density of 2.0 Ag^(-1)(20 m A cm^(-2),allowing charging in less than 1 min),increasing almost 204%over PPy/CNC-COO-films.A symmetric PPy/CNC-COO^(-)-Cl-(ClO_(4)^(-))_0.5 supercapacitor retained its full capacitance after 5000 cycles,and displayed a high energy density of 5.2 Wh kg^(-1)at a power density of 25.4 W kg^(-1)(34.5μWh cm^(-2) at 1752.3μW cm^(-2)).These results reveal that the porous structure formed by doping with CNC-COO-and inorganic salts opens up more active reaction areas to store charges in PPy-based films as the stiff and ribbon-like CNC-COO-as permanent dopants improve the strength and stability of PPy-based *** demonstration provides a simple and practical way to deposit PPy based supercapacitors with high capacitance,fast charging,and excellent cycling stability.

关键词： Polypyrrole Cellulose nanocrystals Cycling stability Inorganic salts Supercapacitor

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Isotopic evidence for volatile replenishment of the Moon during the Late Accretion

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National Science Review 2019年第6期6卷 1247-1254页

作者： Yanhao Lin wim van Westrenen Department of Earth Sciences Vrije Universiteit Amsterdam

The traditional view of a dry, volatile-poor Moon has been challenged by the identification of water and other volatiles in lunar samples, but the volatile budget delivery time（s）, source（s） and temporal evolution remain poorly constrained. Here we show that hydrogen and chlorine isotopic ratios in lunar apatite changed significantly during the Late Accretion（LA, 4.1–3.8 billion years ago）. During this period,deuterium/hydrogen ratios in the Moon changed from initial carbonaceous-chondrite-like values to values consistent with an influx of ordinary-chondrite-like material and pre-LA elevated δ37Cl values drop towards lower chondrite-like values. Inferred pre-LA lunar interior water contents are significantly lower than pristine values suggesting degassing, followed by an increase during the LA. These trends are consistent with dynamic models of solar-system evolution, suggesting that the Moon's（and Earth's） initial volatiles were replenished ～0.5 Ga after their formation, with their final budgets reflecting a mixture of sources and delivery times.

关键词： hydrogen and chlorine isotopes lunar apatite volatile replenishment Late Accretion

Increasing significance of advanced physical/chemical processes in the development and application of sustainable wastewater treatment systems

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Frontiers of Environmental Science & Engineering 2008年第4期2卷 385-396页

作者： wim RULKENS Sub-department of Environmental Technology Wageningen UniversityP.O.Box 81296700 EV WageningenThe Netherlands

The awareness of the problem of the scarcity of water of high quality has strongly changed the approach of wastewater ***,there is an increasing need for the beneficial reuse of treated wastewater and to recover valuable products and energy from the *** microbiological treatment methods are,only to a limited part,able to satisfy these needs,the role and significance of physical/chemical processes in wastewater treatment are gaining more and more *** specific future role and aim of the various physical/chemical treatment processes can be categorized in five groups:improvement of the performance of microbiological treatment processes,achievement of the high quality required for reuse of the effluent,recovery of valuable components and energy from the wastewater for beneficial reuse,desalination of brackish water and seawater,and treatment of concentrated liquid or solid waste residues produced in a wastewater treatment *** of more environmentally sustainable wastewater treatment chains in which physical/chemical processes play a crucial role,also requires application of process control and modeling *** is briefly introduced by the elaboration of treatment scenarios for three specific wastewaters.

关键词： physical/chemical processes future role significance sustainable wastewater treatment reuse recovery valuable products

Oxygen as a catalyst in the Earth's interior?

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National Science Review 2021年第4期8卷 7-8页

作者： Yanhao Lin wim van Westrenen Center for High Pressure Science and Technology Advanced Research Earth and Planets Laboratory Carnegie Institution for Science Department of Earth Sciences Faculty of Science Vrije Universiteit Amsterdam

The abundance of the element oxygen is not only crucial for life at the surface of the Earth, but also greatly affects the properties and dynamics of the interior of our planet. The combination of a highly oxidized at...

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Extent of surgery in cancer of the colon:Is more better?

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World Journal of Gastroenterology 2015年第1期21卷 132-138页

作者： Wouter Willaert wim Ceelen Department of Surgery Ghent University HospitalB-9000 GhentBelgium

Since the introduction of total mesorectal excision as the standard approach in mid and low rectal cancer,the incidence of local recurrence has sharply *** attention to surgical technique in colon cancer(CC) has resulted in the concept of complete mesocolic excision(CME),which consists of complete removal of the intact mesentery and high ligation of the vascular supply at its *** renewed attention to meticulous surgical technique certainly has its merits,routine implementation of CME is currently ***,in contrast to rectal cancer,local recurrence originating from an incompletely removed mesenteryis rare in CC and usually a manifestation of systemic ***,although CME may increase nodal counts and therefore staging accuracy,this is unlikely to affect survival since the observed relationship between nodal counts and outcome in CC is most probably not causal but confounded by a range of clinical ***,several lines of evidence suggest that metastasis to locoregional nodes occurs early and is a stochastic rather than a stepwise phenomenon in CC,in essence reflecting the tumor-host-metastasis ***,therefore,comparative studies in CC as well as in other digestive cancers have failed to demonstrate any survival benefit associated with extensive,additional or extra-mesenteric ***,routine implementation of CME may cause patient harm by longer operating times,major vascular damage and autonomic nerve ***,data from randomized trials reporting relevant endpoints are required before CME can be recommended as a standard approach in CC surgery.

关键词： Colon Adenocarcinoma Surgery Cancer Mesocolic exci

Novel treatment options for portal hypertension

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Gastroenterology Report 2017年第2期5卷 90-103,I0001页

作者： Philipp Schwabl wim Laleman Division of Gastroenterology and Hepatology Department of Internal Medicine IIIMedical University of ViennaViennaAustria Department of Gastroenterology and Hepatology University Hospitals LeuvenKU LeuvenLeuvenBelgium

Portal hypertension is most frequently associated with cirrhosis and is a major driver for associated complications,such as variceal bleeding,ascites or hepatic *** such,clinically significant portal hypertension forms the prelude to decompensation and impacts significantly on the prognosis of patients with liver *** present,non-selective bblockers,vasopressin analogues and somatostatin analogues are the mainstay of treatment but these strategies are far from satisfactory and only target splanchnic *** contrast,safe and reliable strategies to reduce the increased intrahepatic resistance in cirrhotic patients still represent a pending *** recent years,several preclinical and clinical trials have focused on this latter component and other therapeutic *** this review,we highlight novel data in this context and address potentially interesting therapeutic options for the future.

关键词： portal hypertension hepatic venous pressure gradient non-selective b-blockers nitric oxide angiogenesis statins farnesoid X receptor renin-angiotensin-aldosterone

Design of a single all-silicon ring resonator with a 150 nm free spectral range and a 100 nm tuning range around 1550 nm

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Photonics Research 2016年第2期4卷 84-92页

作者： Ang Li Qiangsheng Huang wim Bogaerts Photonics Research Group Department of Information Technology Ghent University-IMEC Center for Nano- and Biophotonics (NB-photonics) Ghent University State Key Laboratory for Modern Optical Instrumentation Centre for Optical and Electromagnetic ResearchZhejiang Provincial Key Laboratory for Sensing Technologies Zhejiang University Luceda Photonics

We present a novel and simple method to obtain an ultrawide free spectral range(FSR) silicon ring resonator together with a tuning range covering the entire spectrum from 1500 to 1600 nm. A ring resonator with a large FSR together with a high Q factor, high tuning efficiency, and low fabrication cost and complexity is desired for many applications. In this paper, we introduce a novel way to make such a ring resonator, which takes advantage of the well-known resonance-splitting phenomenon. It is a single ring resonator with an FSR of more than 150 nm around 1550 nm and which has an easy thermo-optic tunability that can produce a tuning range around 90 nm or even more. Moreover, the device is simple to implement and can be fabricated in standard complementary metal-oxide semiconductor technology without requiring any kind of complicated processing or extra *** potential applications include single mode laser cavities, wavelength division multiplexing filters,(de)multiplexers, optical sensors, and integrated reflectors.

关键词： ring mode free

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Innovation Systems and Systems Development:Innovation Systems and Systems Development:Lessons from History and Prospects for the Future

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学术界 2010年第2期 241-249页

作者： wim Ravesteijn Delft University of Technology the Netherlands

This paper addresses the question 'What drives economic growth from a socio-technical perspective'.It discusses the concept of'innovation system',especially at the national level,and its three components: actors and factors,interrelationships and *** examples will be given from eighteenth century England （especially the Watt-Boulton steam engine firm） and the late nineteenth and early twentieth century USA （especially the contribution of Thomas Edison）.Lessons are drawn for China,focusing on Harbin Development Zone.A broader involvement of Chinese society and sustainable engineering are suggested to be conditional for further socio-economic growth.

关键词： Technological innovation self-sustained economic growth industrial revolutions socio-technical systems sustainable development

The Last Glacial-Interglacial Transition

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Episodes 2008年第2期31卷 226-229页

作者： wim Z. Hoek Department of Physical Geography Faculty of Geosciences Utrecht University Heidelberglaan 2 NL 3508 TC Utrecht The Netherlands.

The Last Glacial-Interglacial Transition is one of the most intensively studied periods in Earth History. The rapid climate and environmental changes that occurred during the transition can be used to test ideas about the functioning of our climate system. The stratigraphy of this period has been thoroughly investigated and, in particular, the recently proposed event stratigraphy for the Last Glacial-Interglacial Transition based on the Greenland ice core records serves as a tool for synchronisation of records from the ice, marine and terrestrial environment.

关键词：冰河-间冰期转换周期地球气候