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Nitrogen-rich hierarchically porous carbon foams as high-performance electrodes for lithium-based dual-ion capacitor

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Journal of Energy Chemistry 2020年第9期29卷 187-194,I0006页

作者： Yue Chen Xiaoming Qiu li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Shanxi Key Laboratory of New Energy Materials and Devices Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Nitrogen-rich porous carbonaceous materials have shown great potential in energy storage and conversion applications due to their facile fabrication,high electronic conductivity,and improved hydrophilic ***,three-dimensional porous N-rich carbon foams are fabricated through a one-step carbonization-activation method of the commercial melamine foam,and displaying hierarchically porous structure(macro-,meso-,and micro-pores),large surface area(1686.5 m2 g^-1),high N-containing level(3.3 at%),and excellent *** as-prepared carbon foams as electrodes for quasi-solid-state supercapacitors exhibit enhanced energy storage ability with 210 F g^-1 and 2.48c at 0.1 A g^-1,and150 F g^-1 and 1.77 F cm^-2 at 1 A g^-1,***,as an electrode for lithium-based dual-ion capacitor,this distinctive porous carbon also delivers remarkable specific capacitance with 143.6 F g^-1 at0.1 A g^-1 and 116.2 F g^-1 at 1 A g^-*** simple preparation method and the fascinating electrochemical performance endow the N-rich porous carbon foams great prospects as high-performance electrodes for electrochemical energy storage.

关键词： Nitrogen-rich Carbon foam Hierarchically porous structure Dual-ion capacitor

Cationic potential:An effective descriptor for rational design of layered oxides for sodium-ion batteries

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Green Energy & Environment 2021年第4期6卷 455-457页

作者： Xudong Zhao li-zhen fan zhen Zhou Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing100083China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou450001China

Sodium-ion batteries are very promising in large-scale energy *** exploration of Na layered oxides as cathode materials for Na ion batteries usually consumes much resource,while the performances of Na layered oxides are dominated by their crystal ***,it is highly desired to predict the stacking mode of the target oxides in advance:whether O3-type with higher ordered structure and stability,or P2-type with more Na *** this purpose density functional theory computations do not *** recently,Hu's group and international collaborators have proposed a cationic potential to provide a very timely,effective,and accurate criterion to predict the stacking mode of Na layered oxides(Science,370(2020)708-711).Under the guidance of the cationic potential phase map,Na layered oxides could be rationally *** we would like to highlight the progress that novel Na layered oxides could be obtained with the combination of large specific capacity,high power density and good cycling stability.

关键词： Na ion batteries Layered oxides Materials design

Self-standing Na-storage anode of Fe2O3 nanodots encapsulated in porous N-doped carbon nanofibers with ultra-high cyclic stability

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Nano Research 2018年第8期11卷 4026-4037页

作者： Yongchang liu fanfan Wang li-zhen fan Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China Yongchang liu and fanfan Wang contributed equally to this work.

Ultrasmall y-Fe203 nanodots （- 3.4 nm） were homogeneously encapsulated in interlinked porous N-doped carbon nanofibers （labeled as Fe2O3@C） at a considerable loading （-51 wt.%） via an electrospinning technique. Moreover, the size and content of Fe2O3 could be controlled by adjusting the synthesis conditions. The obtained Fe203@C that functioned as a self-standing membrane was used directly as a binder- and current collector-free anode for sodium-ion batteries, displaying fascinating electrochemical performance in terms of the exceptional rate capability （529 *** at 100 mA-g-1 compared with 215 mA-h-g-1 at 10,000 mA.g-1） and unprecedented cyclic stability （98.3% capacity retention over 1,000 cycles）. Furthermore, the Na-ion full cell constructed with the Fe2O3C anode and a P2-Na2/3Ni1/3Mn2/302 cathode also exhibited notable durability with 97.2% capacity retention after 300 cycles. This outstanding performance is attributed to the distinctive three-dimensional network structure of the very-fine Fe203 nanoparticles uniformly embedded in the interconnected porous N-doped carbon nanofibers that effectively facilitated electronic/ionic transport and prevented active materials pulverization/aggregation caused by volume change upon prolonged cycling. The simple and scalable preparation route, as well as the excellent electrochemical performance, endows the Fe2O3@C nanofibers with great prospects as high-rate and long-life Na-storage anode materials.

关键词： sodium-ion batteries self-standing anode Fe2O3 nanopartides N-doped porous carbonnanofibers electrospinning

Enhancing interfacial stability in solid-state lithium batteries with polymer/garnet solid electrolyte and composite cathode framework

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Journal of Energy Chemistry 2021年第1期30卷 210-217,I0007页

作者： Long Chen Xiaoming Qiu Zhiming Bai li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Advanced Chemical Energy Storage Technologies and Materials Research Institute of Chemical DefenseBeijing 100191China Shanxi Key Laboratory of New Energy Materials and Devices Taiyuan University of Technology030024China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

The solid-state lithium battery is considered as an ideal next-generation energy storage device owing to its high safety,high energy density and low ***,the poor ionic conductivity of solid electrolyte and low interfacial stability has hindered the application of solid-state lithium ***,a flexible polymer/garnet solid electrolyte is prepared with poly(ethylene oxide),poly(vinylidene fluoride),li6.75La3 Zr1.75Ta0.25O12,lithium bis(trifluoromethanesulfonyl)imide and oxalate,which exhibits an ionic conductivity of 2.0 ×10^(-4) S cm^(-1) at 55℃,improved mechanical property,wide electrochemical window(4.8 V ***/li+),enhanced thermal *** acidic OX was introduced to inhibit the alkalinity reactions between li6.75La3 Zr1.75Ta0.25O12 and poly(vinylidene fluoride).In order to improve the interfacial stability between cathode and electrolyte,an Al2 O3@liNi0.5Co0.2Mn0.3O2 based composite cathode framework is also fabricated with poly(ethylene oxide) polymer and lithium salt as *** solid-state lithium battery assembled with polymer/garnet solid electrolyte and composite cathode framework demonstrates a high initial discharge capacity of 150.6 mAh g^(-1) and good capacity retention of 86.7% after 80 cycles at 0.2 C and 55℃,which provides a promising choice for achieving the stable electrode/electrolyte interfacial contact in solid-state lithium batteries.

关键词： li6.75La3Zr1.75Ta0.25O12 Polymer/garnet solid electrolyte Interfacial stability Composite cathode framework lithium metal batteries

Porous polymer electrolytes for long-cycle stable quasi-solid-state magnesium batteries

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Journal of Energy Chemistry 2021年第8期30卷 608-614,I0013页

作者： Tiantian Wang Xudong Zhao fanfan liu li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology Beijing100083 BeijingChina

The development of applicable electrolytes is the key point for high-performance rechargeable magnesium batteries(RMBs).The use of liquid electrolyte is prone to safety problems caused by liquid electrolyte ***-based gel electrolytes with high ionic conductivity,great flexibility,easy processing,and high safety have been studied by many scholars in recent *** this work,a novel porous poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)membrane is prepared by a phase inversion *** immersing porous PVDF-HFP membranes in MgCl2-AlCl3/TEGDME(Tetraethylene glycol dimethyl ether)electrolytes,porous PVDF-HFP based electrolytes(PPEs)are *** PPE exhibits a high ionic conductivity(4.72×10^(-4) S cm-1,25℃),a high liquid electrolyte uptake of 162%,as well as a wide voltage window(3.1 V).The galvanostatic cycling test of Mg//Mg symmetric cell with PPE reveals that the reversible magnesium ion(Mg^(2+))plating/stripping occurs at low overpotentials(~0.13 V).Excellent long cycle stability(65.5 mAh g^(-1) over 1700 cycles)is achieved for the quasisolid-state RMB assembled with MoS2/C cathode and Mg *** with the liquid electrolyte,the PPE could effectively reduce the side reactions and make Mg^(2+)plating/stripping more uniformly on the Mg electrode *** strategy herein provides a new route to fabricate high-performance RMB through suitable cathode material and polymer electrolyte with excellent performance.

关键词： Porous polymer electrolyte Reversible plating/stripping process MoS_(2)/C cathode Quasi-solid-state magnesium batteries

A robust solid electrolyte interphase enabled by solvate ionic liquid for high-performance sulfide-based all-solid-state lithium metal batteries

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Nano Research 2023年第6期16卷 8411-8416页

作者： Jingguang Yi Chong Yan Dan Zhou li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China School of electrical engineering and automation Luoyang Institute of Science and TechnologyLuoyang 471023China Shanxi Research Institute for Clean Energy Tsinghua UniversityTaiyuan 030032China

All-solid-state lithium metal batteries(ASSLMBs)that incorporate solid electrolyte(SE)and lithium metal anode suggest considerable potential in addressing the security concerns and energy density limitation of conventional lithium-ion batteries(liBs).However,the practical application of ASSLMBs is always restricted by the interfacial instability of lithium metal anode/electrolyte and inevitable lithium dendrites propagation in ***,a solvate ionic liquid is adopted to modify the interface stability of lithium metal anode/electrolyte and inhibit the growth of lithium dendrites via an in-situ formation of a robust solid electrolyte interphase(SEI)on the surface of lithium metal ***,the ASSLMBs assembled with li_(6)PS_(5)Cl(LPSCl)electrolyte,lithium metal anode that protected by robust SEI layer,and liNbO_(3)@NCM622 cathode exhibit high initial capacity of 126.5 mAh·g^(−1)and improved cycling stability with a capacity retention of 80.3%over 60 cycles at 0.1 *** work helps to provide a facile route for the design of robust SEI in the application of ASSLMBs.

关键词： all-solid-state lithium metal batteries solvate ionic liquid robust solid electrolyte interphase li_(6)PS_(5)Cl(LPSCl)electrolyte

Metallic phase W_(0.9)Mo_(0.1)S_(2)for high-performance anode of sodium ion batteries through suppressing the dissolution of polysulfides

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Journal of Energy Chemistry 2022年第3期31卷 356-365,I0010页

作者： Huachao Tao Jing li Jinhang li zhenhua Hou Xuelin Yang li-zhen fan College of Electrical Engineering&New Energy Hubei Provincial Collaborative Innovation Center for New Energy MicrogridChina Three Gorges UniversityYichang 443002HubeiChina Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China

WS_(2)with layered graphite-like structure as anode for sodium ion batteries has high specific ***,the poor cycling performance and rate capability of WS_(2)caused by the low electronic conductivity and structure changes during cycles inhibit its practical ***,metallic phase(1T)W_(x)Mo_(1−x)S2(x=1,0.9,0.8 and 0.6)with high electronic conductivity and expanded interlayer spacing of 0.95 nm was directly prepared via a simple hydrothermal ***,1T W_(0.9)Mo_(0.1)S_(2)as anode for sodium ion batteries displays high capacities of 411 mAh g^(-1)at 0.1 A g^(-1)after 180 cycles and 262 mAh g^(-1)at 1 A g^(-1)after 280 cycles and excellent rate capability(245 mAh g^(-1)at 5 A g^(-1)).The full cell based on Na_(3)V_(2)(PO_(4))_(2)O_(2)F/C cathode and 1T W_(0.9)Mo_(0.1)S_(2)anode also exhibits high capacity and good cycling *** irreversible electrochemical reaction of 1T W_(0.9)Mo_(0.1)S_(2)with Na ions during first few cycles results in the main products of W-Mo alloy and *** strong adsorption of W-Mo alloy with polysulfides can effectively suppress the dissolution and shuttle effect of polysulfides,which ensures the excellent cycling performance of 1T W_(0.9)Mo_(0.1)S_(2).

关键词： Sodium ion batteries Anode 1T W_(0.9)Mo_(0.1)S_(2) Irreversible conversion reaction Polysulfides

Research progress on construction and energy storage performance of MXene heterostructures

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Journal of Energy Chemistry 2021年第11期30卷 220-242,I0005页

作者： fanfan liu Sen jin Qixun Xia Aiguo Zhou li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and TechnologiesUniversity of Science and Technology BeijingBeijing 100083China Henan Key Laboratory of Materials on Deep-Earth Engineering School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000HenanChina

MXenes are a family of two-dimensional (2D) transition metal carbides, carbonitrides/nitrides with superior physical and chemical properties, which have attracted extensive attention since the discovery in 2011. The impressive electrochemical activity of MXene makes it one of the most potential electrode materials in rechargeable batteries and supercapacitors. However, single-component MXene electrodes are difficult to achieve high specific capacity, efficient ion/electron transport, and high stability compatibility in an electrochemical environment. Studies have shown that it is an effective method to introduce nanomaterials between MXene layers to construct heterostructures and to improve the electrochemical performance through the synergistic effect among the components in the heterostructures. The introduction of nanomaterials can effectively suppress the restacking of MXene nanosheets, shorten the diffusion path of ions and promote the electrolyte transport, which is beneficial to enhance the rate performance of MXene;moreover, the excellent mechanical flexibility of MXene can reduce the volume expansion of nanomaterials during charge/discharge, thereby effectively protecting the integrity of the electrode structure and improving the cycling stability. Therefore, in this review, combined with theoretical calculations, we summarize the recent advances of MXene heterostructures in terms of synthesis strategies and energy storage applications, including supercapacitors, metal-ions batteries (li, Na, K, Mg, Zn, Al) and metal anode protection. Furthermore, potential challenges and application perspectives for MXene heterostructures are also outlined.

关键词： MXene heterostructures Construction techniques Energy storage

Constructing MOF-derived CoP-NC@MXene sandwich-like composite by in-situ intercalation for enhanced lithium and sodium storage

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Journal of Materiomics 2022年第1期8卷 30-37页

作者： Xiaobin liu fanfan liu Xudong Zhao li-zhen fan Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083PR China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao266042PR China

The development of dual-function anode materials for lithium-ion batteries(liBs)and sodium-ion batteries(SIBs)is exceedingly ***,with rationally designed hierarchical metal-organic framework(MOF)@MXene as a precursor,a novel sandwich-like CoP-NC@Ti_(3)C_(2)T_(x) composite has been successfully fabricated by the following phosphorization *** anode material for liBs,the CoPNC@Ti_(3)C_(2)T_(x) composite exhibits remarkable electrochemical performance with high-rate capability(147.8 mAh g^(-1) at 2000 mA g^(-1);245.6 mAh g^(-1) at 100 mA g^(-1))and ultralong cycling life(2000 cycles with a capacity retention over 100%).For SIBs,it delivers a discharge capacity of 101.6 mAh g^(-1) at a current density of 500 mA g^(-1) after 500 *** well-designed sandwich-like composite effectively supports the easy access to electrolyte,facilitate the li/Na ion transportation,and protect the active material from pulverization upon long *** addition,the electrochemical reaction kinetics and li-migration kinetics of the CoP-NC@Ti_(3)C_(2)T_(x) composite have been pioneeringly illuminated by pseudocapacitive behavior calculation and density functional theory(DFT)computations,*** work sheds light on the rational design and development of MOF/MXene-derived dual-function anode materials for li/Na-storage.

关键词： Metal-organic framework(MOF) MXene li/Na-storage