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| 1 | Electronically coupled layered double hydroxide/MXene quantum dot metallic hybrids for high-performance flexible zinc–air batteries显示文摘Precise control of the local electronic structure and properties of electrocatalysts is important for enhancing the multifunctionality and durability of electrocatalysts and for correlating the structure/chemistry with the catalytic properties.Herein,we report electronically coupled metallic hybrids of NiFe layered double hydroxide nanosheet/Ti3C2 MXene quantum dots deposited on a nitrogen-doped graphene surface(LDH/MQD/NG)for high-performance flexible Zn-air batteries(ZABs).As verified from the Mott-Schottky and Nyquist plots,as well as spectroscopic,electrochemical,and computational analyses,the electronic and chemical coupling of LDH/MQD/NG modulates the local electronic and surface structure of the active LDH to provide metallic conductivity and abundant active sites,leading to significantly improved bifunctional activity and electrocatalytic kinetics.The rechargeable ZABs with LDH/MQD/NG hybrids are superior to the previous LDH-based ZABs,demonstrating a high power density(113.8 mW cm^(-2))and excellent cycle stability(150 h at 5 mA cm^(-2)).Moreover,the corresponding quasi solid-state ZABs are completely flexible and practical,affording a high power density of 57.6 mW cm^(-2)even in the bent state,and in real-life operation of tandem cells for powering various electronic devices. | Xiaotong Han Nannan Li Peixun Xiong Min Gyu Jung Yingbo Kang Qingyun Dou Qing Liu Jin Yong Lee Ho Seok Park | 2021 | InfoMat2021，3，10： | 4 |
| 2 | Risk factors of recurrent acute pancreatitis after conservative treatment in pediatric population: a single-center study显示文摘Background Although complete resolution and recovery occurs in most children with an initial attack of acute pancreatitis(AP),a subset of children may progress to recurrent AP(RAP).RAP has serious effects to the individual and the socioeconomic burden.The aim of this project was to identify the independent risk factors for pediatric RAP so as to provide evidence for its prevention,early diagnosis and treatment.Methods A retrospective cohort study of children discharged from Tianjin Children’s Hospital from June 2017 to January 2020 was performed.Demographic and clinical variables,treatment strategies,clinical course and outcomes were collected.Independent risk factors of RAP were identified using the logistic regression model.Results Of the total 96 enrolled children,30(31.3%)developed RAP during the follow-up period.The majority(27/30,90%)of the children with AP developed RAP within 6 months of their first AP attack.The presence of systemic inflammatory response syndrome(SIRS)[odds ratio(OR)=6.652,95%confidence interval(CI)1.989 to 22.247],fasting time(OR=1.267,95%CI 1.104 to 1.583),whether meet all three AP diagnostic criteria(OR=7.438,95%CI 1.346 to 41.103)and abnormal amylase/lipase value on the seventh day of hospitalization(OR=3.601,95%CI 0.972 to 13.342)were independent risk factors of RAP in children.Conclusions Most children who developed RAP had progressed within 6 months after their first episode of AP.RAP was more common in children who met all three AP diagnostic criteria at initial attack and in children with SIRS,long fasting time and abnormal amylase/lipase value on the seventh day of hospitalization. | Qipeng Zheng Xueqiang Yan Liang Ge Shujian Zhang Yan Sun Jinfu Jia Shengqiao Zhao Xiaodan Xu Ran Dou Qingyun Gou Jinfeng Zhao Jianghua Zhan | 2021 | World Journal of Pediatric Surgery2021，4，1： | 1 |
| 3 | Two-Dimensional Pseudocapacitive Nanomaterials for High-Energy-and High-Power-Oriented Applications of Supercapacitors显示文摘CONSPECTUS:Supercapacitors(SCs)are electrochemical energy storage devices that can fill the gap between batteries and electrolytic capacitors.However,the widespread applications of commercialized carbon-based SCs are limited by their energy density,arising from their physical charge storage mechanism,which is by far lower than that of batteries.Moreover,the highpowered applications of SCs are also limited by their kinetics,which are slower than those of electrolytic capacitor due to the diffusion and distribution of ions onto the tortuous porous surface.Therefore,the energy and power performance of SCs need to be improved to open or further extend their practical applications.Since all atoms of two-dimensional(2D)nanomaterials are located on the surface,the design of surface structure is critical to determining the bulk electrochemical properties.Such a surface-oriented property of 2D nanomaterials is well fitted to control the surface charge storage mechanism of SCs,thereby discovering emerging capacitive materials through the rational design of surface chemistry and multiscale structures.This Account discusses our recent progress on 2D pseudocapacitive materials for high-energyand high-power-oriented SCs applications and provides our perspective into the rational design of the microstructure,multiscale architecture,and surface chemistry.Examples of 2D nanomaterials include heteroatom-doped graphene,black phosphorus,transition-metal dichalcogenides,and transition-metal carbide/nitrides(MXene).We also highlight the in-depth spectroelectrochemical and computational analyses that can correlate the structures and chemistries of 2D nanomaterials with their charge storage/transport/transfer behaviors.In this Account,our design concept of 2D nanomaterials is based on two aspects of charge storage capability and kinetics that can determine the thermodynamic(capacitance)and kinetic(rate)performances.First,chemical strategies,such as atomic incorporation,surface functionalization/coordination,and hybridization of 2D nanomaterials,will be provided and correlated with the population of redox storage sites and interaction between sites and ions.The charge storage capacitance can be improved by controlling these factors for high-energy-oriented applications.Second,we will address key factors such as charge-transfer kinetics,ion-transporting pathways,and percolated electron transport for high-power-oriented applications.Several approaches such as multiscale architecture,hybridization with electronically conductive materials,pore orientation,and an expanded interlayer space will be introduced to improve the kinetic performance of 2D nanomaterials.Finally,we will provide our perspective on technical impediments and future research directions of 2D nanomaterials for practical energy-and power-oriented applications of SCs. | Puritut Nakhanivej Qingyun Dou Peixun Xiong Ho Seok Park | 2021 | Accounts of Materials Research2021，2，2： | 0 |
| 4 | Outcomes of biliary atresia splenic malformation(BASM)syndrome following Kasai operation:a systematic review and meta-analysis显示文摘Biliary atresia(BA)is a rare life-limiting fibroobliterative disorder of the bile ducts that can advance to end-stage liver disease,with an incidence of approximately 1:8000–1:18000.1 BA is characterized by the onset of persistent cholestatic jaundice during the neonatal period,yet the underlying etiology is not well understood.However,about 10%of infants with BA exhibit other congenital anomalies—a distinctive subgroup commonly referred to as biliary atresia splenic malformation(BASM)syndrome and others such as polysplenia or polysplenia syndrome.2 The incidence of the syndromic form of BA is lower in Japan and South Asia. | Xiaodan Xu Ran Dou Shengqiao Zhao Jinfeng Zhao Qingyun Gou Li Wang Jianghua Zhan | 2022 | World Journal of Pediatric Surgery2022，5，3： | 0 |
| 5 | Bifunctional fluoropyridinium-based cationic electrolyte additive for dendrite-free Li metal anode显示文摘Although lithium metal has become a promising anode material for high-energy batteries owing to its high specific capacity and the lowest reduction potential,the continuous side reactions with electrolyte as well as the safety problem caused by Li dendrite growth restrict Li anode’s practical application.Herein,we demonstrate that N-fluoropyridinium(ArF^(+))bis(trifluoromethane)sulfonimide(TFSI-)as an electrolyte additive can protect the lithium metal by both solid electrolyte interphase(SEI)protection and electrostatic repulsion mechanisms.The ArF+cations not only participate in forming F,Ncontaining SEI protective layer on Li surface,but also act as a cationic repellent during Li deposition to inhibit Li dendrite growth.As a result,the cycle performance of Li symmetric cells and Li||LiFePO_(4)full cells were significantly improved by using ArFTFSIadded electrolyte.This study provides an electrolyte additive strategy for Li anode realizing SEI protection and electrostatic repulsion simultaneously. | Kunyao Peng Pei Tang Qianqian Yao Qingyun Dou Xingbin Yan | 2023 | Nano Research2023，16，7： | 0 |
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