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| 1 | Precise synthesis of N-doped graphitic carbon via chemical vapor deposition to unravel the dopant functions on potassium storage toward practical K-ion batteries显示文摘Nitrogen doped carbon is a burgeoning anode candidate for potassium-ion battery(PIBs)owing to its outstanding attributes.It is imperative to grasp further insight into specific effects of different nitrogen dopants in carbon anode toward advanced K-ion storage.However,the prevailing fabrication method is plagued by the fact that considerable variations in the total N-doping concentration occur in the course of regulating the type of nitrogen dopants,incapable of distinguishing the certain roles of them under similar conditions.Herein,throughout the precise preparation of high edge-N doped carbon(HENC)and high graphitic-N doped carbon(HGNC)harnessing basically identical N-doping levels(5.78 at.%for HENC;5.07 at.%for HGNC)via chemical vapor deposition route,the effects of edge-N and graphitic-N in the carbon anode on K-ion storage are revisited,offering guidance into the design of low-cost and high-performance PIB systems. | Yu Zhao Zhongti Sun Yuyang Yi Chen Lu Menglei Wang Zhou Xia Xueyu Lian Zhongfan Liu Jingyu Sun | 2021 | Nano Research2021，14，5： | 4 |
| 2 | Nature-inspired Cu2O@CoO tree-like architecture for robust storage of sodium显示文摘We report a nature-inspired design of tree-like architecture of cuprous oxide(Cu2O)stem and cobalt oxides(CoO)branch serving as an efficient anode for sodium-ion batteries.The construction of stembranch architectures involves the growth of Cu2O nanorods and the subsequent deposition of CoO nanowires.Due to abundant active sites and full exposure to electrolyte,such a Cu2O@CoO stem-branch architecture demonstrates a robust storage toward Na^+ions,affording a capacity retention of^100%over 300 continuous cycles and a remarkable rate capability of 296 mAh g^-1 at 1 A g^-1.This result clearly shows the potential of nature-inspired materials engineering may find extensive applications in the design of high-performance electrodes for rechargeable batteries. | Zhenzhu Wang Menglei Sun Jiangfeng Ni Liang Li | 2020 | Journal of Materials Science & Technology2020，52，18： | 2 |
| 3 | Application of materials based on group VB elements in sodium-ion batteries:A review显示文摘Owing to their high redox activity, abundant resource, and low cost, compounds based on group VB elements(V, Nb, and Ta) are promising electrode materials for an array of energy storage devices. Moreover,their open structure benefits transportation and accommodation of alkali Na+ions, rending them particularly appealing for cost-effective sodium-ion batteries(SIBs). In the last decade, these materials have evoked intensive investigations in SIBs, serving as either cathode, anode, or both depending on their sodiation degree and redox potential. Exciting progress has been made, but significant gaps in our knowledge still remain. Their practical application in SIBs remains unclear and thus calls for further efforts to settle several technical challenges in terms of poor conductivity, unstable cycling, and inefficient charge storage. In this perspective, a brief overview is given of recent progress on how to solve these technical issues and envision their bright future in SIBs, which may serve as a source to inspire researches on relevant topics. | Menglei Sun Yu Jiang Jiangfeng Ni Liang Li | 2018 | Journal of Materials Science & Technology2018，34，11： | 1 |
| 4 | Materials based on group IVA elements for alloying-type sodium storage显示文摘There are five elements in group IVA of the periodic table, i.e., carbon(C), silicon(Si), germanium(Ge), tin(Sn) and lead(Pb),of which Si, Ge, and Sn can be used as alloying-type electrode materials for sodium-ion batteries. Pb is also capable of alloying with sodium, but it is generally ruled out as the cause of toxicity. In recent years, materials based on Si, Ge, and Sn have been intensively exploited as sodium anodes because of their abundant resource and large capacity with reasonable working voltages.However, successful deployment of these anode materials needs to overcome kinetic and thermodynamic issues related to poor electrochemical activity, particle pulverization associated with large volume swelling, and formation of unstable solid-electrolyte interphase. A diversity of material strategies has been employed to address these difficulties, mainly leveraging on the knowledge recently advanced for lithium anodes. This review highlights such issues and provides valuable insights for possible solutions, which serves as a guide and inspiration for future material innovation for rechargeable batteries. | Xiaocui Zhu Menglei Sun Jiangfeng Ni Liang Li | 2018 | Science China Chemistry2018，61，12： | 1 |
| 5 | Decorating Vertically Oriented Graphene Arrays with Co-Doped NiTe_(2)Toward Al-Current-Collector-Free Li-S Batteries显示文摘Lithium-sulfur(Li-S)batteries are broadly regarded as one of the most promising energy storage systems owing to their high-energy and low-cost features.Nevertheless,their practical implementation is plagued by the notorious polysulfide shuttling and sluggish reaction kinetics.Transition metal telluride has emerged as a promising electrocatalyst to expedite sulfur redox kinetics,even though its controllable and precise fabrication remains quite elusive.Herein,we propose the employment of a chemical vapor deposition approach to achieve in situ growth of Co-doped NiTe_(2)(Co-NiTe_(2))on vertically oriented graphene coated carbon cloth(VG/CC)substrate,in the pursuit of high-performance sulfur host material(Co-NiTe_(2)@VG/CC)in Li-S realms.Electrokinetic analysis and operando Raman spectroscopy characterization reveal the effective regulation capability of Co-NiTe_(2)@VG/CC with respect to polysulfide capture/conversion and Li2S decomposition.As a result,the Al-currentcollector-free Co-NiTe_(2)@VG/CC-based cathodes with typical sulfur loading exhibit outstanding cycling stability(93.8% capacity retention over 100 cycles at 0.5 C).Moreover,an areal capacity of 4.27 mAh cm^(-2) at 0.2 C can be harvested even at an elevated sulfur loading of 7.2 mg cm^(-2). | Yujie Zhu Menglei Wang Haina Ci Yifan Ding Xiang Gao Jingyu Sun | 2023 | Renewables2023，1，5： | 0 |
| 6 | A Natural Polymer Captor for Immobilizing Polysulfide/Polyselenide in Working Li-SeS_(2) Batteries显示文摘SeS_(2) has become a promising cathode material owing to its enhanced electrical conductivity over sulfur and higher theoretical specific capacity than selenium;however,the working Li-SeS_(2) batteries have to face the practical challenges from the severe shuttling of soluble dual intermediates of polysulfide and polyselenide,especially in high-SeS_(2)-loading cathodes.Herein,a natural organic polymer,Nicandra physaloides pectin(NPP),is proposed to serve as an effective polysulfide/polyselenide captor to address the shuttling issues.Informed by theoretical calculations,NPP is competent to provide a Lewis base-based strong binding interaction with polysulfides/polyselenides via forming lithium bonds,and it can be homogeneously deposited onto a three-dimensional double-carbon conductive scaffold to finally constitute a polysulfide/polyselenide-immobilizing interlayer.Operando spectroscopy analysis validates the enhanced polysulfide/polyselenide trapping and high conversion efficiency on the constructed interlayer,hence bestowing the Li-SeS_(2) cells with ultrahigh rate capability(448 mAh g^(−1)at 10 A g^(−1)),durable cycling lifespan(≈0.037%capacity attenuation rate per cycle),and high areal capacity(>6.5 mAh cm^(−2))at high SeS_(2) loading of 15.4 mg cm^(−2).Importantly,pouch cells assembled with this interlayer exhibit excellent flexibility,decent rate capability with relatively low electrolyte-to-capacity ratio,and stable cycling life even under a low electrolyte condition,promising a low-cost,viable design protocol toward practical Li-SeS_(2) batteries. | Yin Zhang Menglei Wang Yi Guo Lingzhi Huang Boya Wang Yunhong Wei Peng Jing Yueying Zhang Yun Zhang Qian Wang Jingyu Sun Hao Wu | 2021 | Nano-Micro Letters2021，13，7： | 0 |
| 7 | Boosting oxygen evolution reactivity by modulating electronic structure and honeycomb-like architecture in Ni_(2)P/N,P-codoped carbon hybrids显示文摘Oxygen evolution reaction(OER)as the foremost stumbling block to generate cost-effective clean fuels has received extensive attention in recent years.But,it still maintains the challenge to manipulate the geometric and electronic structure during single reaction process under the same conditions.Herein,we report a simple self-template strategy to generate honeycomb-like Ni_(2)P/N,P-C hybrids with preferred electronic architecture.Experiments coupled with theoretical results revealed that the synthesized catalyst has two characteristics:firstly,the unique honeycomb-like morphology not only enables the fully utilization of catalytic active sites but also optimizes the mass/electron transportation pathway,which favor the diffusion of electrolyte to accessible active sites.Secondly,N,P-C substrate,on the one hand,largely contributes the electronic distribution near Fermi level(E_(F))thus boosting its electrical conductivity.On the other hand,the support effect result in the upshift of d-band center and electropositivity of Ni sites,which attenuates the energy barrier for the adsorption of OH~àand the formation of*OOH.In consequence,the optimized Ni_(2)P/N,P-C catalysts feature high electrocatalytic activity towards OER(a low overpotential of 252 m V to achieve10 m A cm^(-2))and 10 h long-term stability,the outstanding performance is comparable to most of transition metal catalysts.This work gives a innovative tactics for contriving original OER electrocatalysts,inspirng deeper understanding of fabricating catalysts by combining theoretical simulation and experiment design. | Menglei Yuan Yu Sun Yong Yang Jingxian Zhang Sobia Dipazir Tongkun Zhao Shuwei Li Yongbing Xie He Zhao Zhanjun Liu Guangjin Zhang | 2021 | Green Energy & Environment2021，6，6： | 0 |
| 8 | Direct insight into sulfiphilicity-lithiophilicity design of bifunctional heteroatom-doped graphene mediator toward durable Li-S batteries显示文摘The practical applications of lithium-sulfur(Li-S)battery have been greatly hindered by the severe polysulfide shuttle at the cathode and rampant lithium dendrite growth at the anode.One of the effective solutions deals with concurrent management of both electrodes.Nevertheless,this direction remains in a nascent stage due to a lack of material selection and mechanism exploration.Herein,we devise a temperature-mediated direct chemical vapor deposition strategy to realize the controllable synthesis of three-dimensional boron/nitrogen dual-doped graphene(BNG)particulated architectures,which is employed as a light-weighted and multi-functional mediator for both electrodes in Li-S batteries.Benefiting from the“sulfiphilic”and“lithiophilic”features,the BNG modified separator not only enables boosted kinetics of polysulfide transformation to mitigate the shuttle effect but also endows uniform lithium deposition to suppress the dendritic growth.Theoretical calculations in combination with electro-kinetic tests and operando Raman analysis further elucidate the favorable sulfur and lithium electrochemistry of BNG at a molecular level.This work offers direct insight into the mediator design via controllable synthesis of graphene materials to tackle the fundamental challenges of Li-S batteries. | Haina Ci Menglei Wang Zhongti Sun Chaohui Wei Jingsheng Cai Chen Lu Guang Cui Zhongfan Liu Jingyu Sun | 2022 | Journal of Energy Chemistry2022，31，3： | 0 |
| 9 | A review in rational design of graphene toward advanced Li-S batteries显示文摘For lithium-sulfur(Li-S)batteries,the problems of polysulfides shuttle effect,slow dynamics of sulfur species and growth of lithium dendrite during charge/discharge processes have greatly impeded its practical development.Of core importance to advance the performances of Li-S batteries lies in the selection and design of novel materials with strong polysulfides adsorption ability and enhanced redox electrocatalytic behavior.Graphene,affording high electrical conductivity,superior carrier mobility,and large surface area,has presented great potentials in improving the performances of Li-S cells.However,the properties of intrinsic graphene are far enough to achieve the multiple management toward electrochemical catalysis of energy storage systems.In addition,a general and objective understanding of its role in Li-S systems is still lacking.Along this line,we summarize the design routes from three aspects,including defect engineering,dimension adjustment,and heterostructure modulation,to perfect the graphene properties.Thus-synthesized graphene materials are explored as multifunctional electrocatalysts targeting high-efficiency and long-lifespan Li-S batteries,based on which the regulating role of graphene is comprehensively analyzed.This project provides a perspective on the effective engineering management of graphene materials to boost Li-S chemistry,meanwhile promote the practical application process for graphene materials. | Haina Ci Zixiong Shi Menglei Wang Yan He Jingyu Sun | 2023 | Nano Research Energy2023，2，2： | 0 |
| 10 | Panel Acoustic Contribution Analysis in Automotive Acoustics Using Discontinuous Isogeometric Boundary Element Method显示文摘In automotive industries,panel acoustic contribution analysis(PACA)is used to investigate the contributions of the body panels to the acoustic pressure at a certain point of interest.Currently,PACA is implementedmostly by either experiment-based methods or traditional numerical methods.However,these schemes are effort-consuming and inefficient in solving engineering problems,thereby restraining the further development of PACA in automotive acoustics.In this work,we propose a PACA scheme using discontinuous isogeometric boundary element method(IGABEM)to build an easily implementable and efficient method to identify the relative acoustic contributions of each automotive body panel.Discontinuous IGABEMis more accurate and converges faster than continuous BEM and IGABEM in the interior sound pressure evaluation of automotive compartments.In this work,a contribution ratio is defined to estimate the relative acoustic contribution of the structure panels;it can be calculated by reusing the coefficient matrix that has already been generated in the sound pressure evaluation process.The utilization of the parallel technique enables the proposed method to be more efficient than conventional methods;it is validated in two numerical examples,including a car passenger compartment subjected to realistic boundary conditions.A sound pressure response experiment based on a steel box is conducted to verify the accuracy of the interior sound pressure calculation using discontinuous IGABEM.This work is expected to promote the practical process of IGABEM for application in automotive acoustic problems. | Yi Sun Chihua Lu Zhien Liu Menglei Sun Hao Chen | 2023 | Computer Modeling in Engineering & Sciences2023，，6： | 0 |
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