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Green Energy & Environment 2022年第4期7卷 763-771页

作者： Mei-yi Wang Xin-Xin Zhao Jin-Zhi guo Xue-Jiao Nie zhen-yi gu Xu Yang Xing-Long Wu National&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchunJilin130024China Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchunJilin130024China

Mixing polyanion cathode materials are promising candidates for the development of next-generation batteries, owing to their structural robustness and low-volume changes, yet low conductivity of polyanion hinders their practical capacity. Herein, the anion-site regulation is proposed to elevate the electrode kinetics and properties of polyanionic cathode. Multivalent anion P_(2)O_(7)^(4-) is selected to substitute the PO_(4)^(3-) in Na_(3)V_(2)(PO_(4))_(3) (NVP) lattice and regulate the ratio of polyanion groups to prepare Na_(3+x)V_(2)(PO_(4))_(3-x)(P_(2)O_(7))_(x)(NVPP_(x), 0 ≤ x ≤ 0.15) *** optimal Na_(3.1)V_(2)(PO_(4))_(2.9)(P_(2)O_(7))_(0.1) (NVPP_(0.1)) material can deliver remarkably elevated specific capacity(104 mAh g^(-1) at 0.1 C, 60 mAh g^(-1) at 20 C, respectively), which is higher than those of NVP. Moreover, NVPP_(0.1) exhibits outstanding cyclic stability(91% capacity retention after 300 cycles at 1 C). Experimental analyses reveal that the regulation of anions improves the structure stability, increases the active Na occupancy in the lattice and accelerates the Na+migration kinetics. The strategy of anion-site regulation provides the researchers a reference for the design of new high-performance polyanionic materials.

关键词： Sodium-ion batteries Cathode Polyanion materials Anionic substitution Electrode kinetics

Differential bonding behaviors of sodium/potassium-ion storage in sawdust waste carbon derivatives

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Chinese Chemical Letters 2024年第4期35卷 496-501页

作者： Jun-Ming Cao Kai-Yang Zhang Jia-Lin Yang zhen-yi gu Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Department of Chemistry Northeast Normal UniversityChangchun 130024China

Sodium-ion batteries(SIBs) and potassium-ion batteries(PIBs) are the most promising alternatives to lithium-ion batteries, and thus have drawn intensive research attention. Porous carbon materials from different precursors have been widely used as anode materials owing to their compatible storage effectiveness of both larger radii sodium and potassium ions. However, the differential bonding behaviors of Na and K ions with porous carbon-based anode are the significant one worth investigating, which could provide a clean picture of alkali ions storage mechanism. Therefore, in this work, we prepare a porous carbon network derived from sawdust(SDC) wastes, to further analyze the differences on sodium and potassium ions storage behaviors in terms of bond-forming process. It is found that, as-prepared SDC anodes could deliver stable sodium and potassium storage capacities, however, there are notable distinctions in terms of electrochemical behaviors and diffusion processes. By virtue of ex-situ XRD and Raman spectroscopy, the phase transition reaction of potassium ions could be well-observed, and the results shows that the multiple intercalated compounds was formed in SDC network during ions insertion, further resulting in slower diffusion kinetics and larger resistance compared to non-bonded process of sodium ions storage. This study provides more insights into the differences between sodium and potassium ions storage, as well as the energy storage mechanism of porous carbon as anodes for secondary batteries.

关键词： Porous carbon Sodium-ion storage Potassium-ion storage Bonding behaviors Batteries

Enhanced electrode kinetics and electrochemical properties of low-cost NaFe_(2)PO_(4)(SO_(4))_(2)via Ca~(2+)doping as cathode material for sodium-ion batteries

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Journal of Materials Science & Technology 2021年第19期78卷 176-182页

作者： Shao-Fang Li zhen-yi gu Jin-Zhi guo Xian-Kun Hou Xu Yang Bo Zhao Xing-Long Wu National fy Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun130024China Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityMinistry of EducationChangchun130024China

In recent years,sodium-ion batteries(SIBs)have been considered as one of the most promising alternatives to lithium-ion batteries(LIBs).Here,a new Na-super-ionic conductor(NASICON)cathode material Na Fe_(2)PO_(4)(SO_(4))_(2)is successfully prepared through solid state method for *** the poor electronic conductivity of iron-based materials results in its poor rate and cycle *** the electrochemical is effectively promoting via Ca^(2+)***_(0.84)Ca_(0.08)Fe_(2)PO_(4)(SO_(4))_(2)have achieved considerable electrochemical *** first discharge specific capacity is 121.6 m A h g^(-1)at 25 m A g^(-1)with the voltage platform(-3.1 V)corresponding to Fe^(2+/3+).After 100 cycles,the capacity retention is 55.1%.The excellent electrochemical performance is caused by some Na^(+)is substituted by Ca^(2+)and leading to the fast sodium kinetics,which is well proved by the powder X-ray diffraction pattern and well corresponding to the galvanostatic intermittent titration technique and cyclic voltammetry testing result(the diffusivity values are around at 10^(-12)cm^(2)s^(-1)).

关键词： NaFe_(2)PO_(4)(SO_(4))_(2) Na-super-ionic conductor Sodium-ion batteries Cathode Ca~(2+)doping

Ester-based anti-freezing electrolyte achieving ultra-low temperature cycling for sodium-ion batteries

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Journal of Materials Science & Technology 2024年第15期182卷 111-118页

作者： yi-Tong Liu Hao-Jie Liang Miao Du Jia-Lin Yang zhen-yi gu Xiao-Tong Wang Yuan-zheng Tang Jin-Zhi guo Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityChangchunJilin 130024China MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchunJilin 130024China College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 260061China

With the continuous advancement of industrialization,sodium-ion batteries(SIBs)need to operate in various challenging circumstances,particularly in extremely cold ***,at ultra-low tem-peratures,the reduced ionic conductivity and sluggish Na+migration of commonly carbonate-based elec-trolytes will inevitably lead to a sharp decrease in the capacity of ***,we design a carboxylate ester-based electrolyte with excellent ultra-low temperature performance by straightforward cosolvent *** to the low viscosity,melting point,and sufficient ionic conductivity of the designed elec-trolyte,the resulting Na||Na_(3)V_(2)(PO_(4))_(2)O_(2)F can achieve the capacity retention of 96%(100 cycles at 0.1 C)at-40℃ and can also operate stably even at-50℃.Besides,galvanostatic intermittent titration tech-nique(GITT),ex-situ X-ray photoelectron spectroscopy(XPS),and high-resolution transmission electron microscopy(TEM)tests are employed to analyze and confirm that the carboxylate ester-based electrolyte promotes robust and uniform cathode/electrolyte interface layer formation and accelerates ion diffusion kinetics,which collectively facilitates the better low-temperature *** addition,the assembled hard carbon||NVPOF full cells further prove the practicability of the carboxylate ester-based electrolyte at low-temperature,which delivers high discharge capacity of 108.4 and 73.0 mAh g^(-1) at-25 and-40℃.This work affords a new avenue for designing advanced low-temperature electrolytes for SIBs.

关键词： Sodium-ion batteries Ester-based electrolyte Ultra-low temperature Cathode electrolyte interface Ionic conductivity

Feasible engineering of cathode electrolyte interphase enables the profoundly improved electrochemical properties in dual-ion battery

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Journal of Energy Chemistry 2020年第11期29卷 416-423页

作者： Wen-Hao Li Hao-Jie Liang Xian-Kun Hou zhen-yi gu Xin-Xin Zhao Jin-Zhi guo Xu Yang Xing-Long Wu Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityMinistry of EducationChangchun 130024JilinChina National&Local United Engineering Laboratory for Power Batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024JilinChina

Dual-ion battery(DIB) composed of graphite cathode and lithium anode is regarded as an advanced secondary battery because of the low cost, high working voltage and environmental friendliness. However,DIB operated at high potential(usually ≥ 4.5 V versus Li+/Li) is confronted with severe challenges including electrolyte decomposition on cathode interface, and structural deterioration of graphite accompanying with anions de-/intercalation, hinder its cyclic life. To address those drawbacks and preserve the DIB virtues, a feasible and scalable surface modification is achieved for the commercial graphite cathode of mesocarbon microbead. In/ex-situ studies reveal that, such an interfacial engineering facilitates and reconstructs the formation of chemically stable cathode electrolyte interphase with better flexibility alleviating the decomposition of electrolyte, regulating the anions de-/intercalation behavior in graphite with the retainment of structural integrity and without exerting considerable influence on kinetics of anions diffusion. As a result, the modified mesocarbon microbead exhibits a much-extended cycle life with high capacity retention of 82.3% even after 1000 cycles. This study demonstrates that the interface modification of electrode and coating skeleton play important roles on DIB performance improvement, providing the feasible basis for practical application of DIB owing to the green and scalable coating procedures.

关键词： Dual-ion battery Cathode electrolyte interphase Graphite Cathode

Flexible quasi-solid-state sodium-ion full battery with ultralong cycle life,high energy density and high-rate capability

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Nano Research 2022年第2期15卷 925-932页

作者： Chen-De Zhao Jin-Zhi guo zhen-yi gu Xiao-Tong Wang Xin-Xin Zhao Wen-Hao Li Hai-Yue Yu Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityJilin 130024China MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityJilin 130024China

Flexible power sources featuring high-performance,prominent flexibility and raised safety have received mounting attention in the area of wearable electronic ***,many great challenges remain to be overcome,notably the design and fabrication of flexible electrodes with excellent electrochemical performance and matching them with safe and reliable ***,a facile approach for preparing flexible electrodes,which employs carbon cloth derived from commercial cotton cloth as the substrate of cathode and a flexible anode,is proposed and *** promising cathode(NVPOF@FCC)with high conductivity and outstanding flexibility is prepared by efficiently coating Na_(3)V_(2)(PO_(4))_(2)O_(2)F(NVPOF)on flexible carbon cloth(FCC),which exhibits remarkable electrochemical performance and the significantly improved reaction *** importantly,a novel flexible quasi-solid-state sodium-ion full battery(QSFB)is feasibly assembled by sandwiching a P(VDF-HFP)-NaClO_(4) gel-polymer electrolyte film between the advanced NVPOF@FCC cathode and FCC *** the QSFBs are further evaluated in flexible pouch cells,which not only demonstrates excellent energy-storage performance in aspect of great cycling stability and high-rate capability,but also impressive flexibility and *** work offers a feasible and effective strategy for the design of flexible electrodes,paving the way for the progression of practical and sustainable flexible batteries.

关键词： flexible sodium-ion battery gel-polymer electrolyte quasi-solid-state carbon cloth Na_(3)V_(2)(PO_(4))_(2)O_(2)F

Concurrent recycling chemistry for cathode/anode in spent graphite/LiFePO_(4) batteries:Designing a unique cation/anion-co-workable dual-ion battery

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Journal of Energy Chemistry 2022年第1期31卷 166-171,I0005页

作者： Yun-Feng Meng Hao-Jie Liang Chen-De Zhao Wen-Hao Li zhen-yi gu Meng-Xuan Yu Bo Zhao Xian-Kun Hou Xing-Long Wu Faculty of Chemistry Northeast Normal UniversityChangchun 130024JilinChina MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024JilinChina

With the increasing popularity of new en ergy electric vehicles,the dema nd for lithium-ion batteries(LIBs)has been growing rapidly,which will produce a large number of spent ***,recycling of spe nt LIBs has become an urge nt task to be solved,otherwise it will inevitably lead to serious environmental ***,a unique recycling strategy is proposed to achieve the concurrent reuse of cathode and anode in the spent graphite/LiFePO_(4) *** with such recycling process,a unique cathode composed of recycled LFP/graphite(RLFPG)with cation/anion-co-storage ability is designed for new-type dual-ion battery(DIB).As a result,the recycle-derived DIB of Li/RLFPG is established with good electrochemical performance,such as an initial discharge capacity of 117.4 mA h g^(-1) at 25 mA g^(-1) and 78% capacity retention after 1000 cycles at 100 mA g^(-1).The working mechanism of Li/RLFPG DIB is also revealed via in situ X-ray diffraction and electrode kinetics *** work not only presents a farreaching significance for large-scale recycling of spent LIBs in the future,but also proposed a sustainable and econo mical method to design n ew-type sec on dary batteries as recycling of spe nt LIBs.

关键词： Dual-ion batteries LiFePO_(4) Graphite Spenr lithium-ion batteries Recycle

An advanced cathode composite for co-utilization of cations and anions in lithium batteries

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Journal of Materials Science & Technology 2022年第7期102卷 72-79页

作者： Xiao-Tong Wang Yang Yang Jin-Zhi guo zhen-yi gu Edison Huixiang Ang Zhong-Hui Sun Wen-Hao Li Hao-Jie Liang Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Faculty of Chemistry Northeast Normal UniversityChangchun 130024China Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingapore 637616Singapore Center for Advanced Analytical Science c/o School of Chemistry and Chemical Engineeringc/o MOE Key Laboratory for Water Quality and Conservation of the Pearl River DeltaGuangzhou UniversityGuangzhou 510006China

Anions in the electrolyte are usually ignored in conventional"rocking-chair"batteries because only cationic de-/intercalation is *** ingenious scheme combining LiMn_(0.7)Fe_(0.3)PO_(4)(LMFP@C)and graphite as a hybrid cathode for lithium-ion batteries(LIBs)is elaborately designed in order to exploit the potential value of anions for battery *** hybrid cathode has a higher conductivity and energy density than any of the individual components,allowing for the co-utilization of cations and an-ions through the de-/intercalation of Li^(+)and PF_(6)−over a wide voltage *** optimal compound with a weight mix ratio of LMFP@C:graphite=5:1 can deliver the highest specific capacity of nearly 140 mA h/g at 0.1 C and the highest voltage plateau of around 4.95 V by adjusting the appropriate mixing *** addition,cyclic voltammetry was used to investigate the electrode kinetics of Li^(+)and PF_(6)−dif-fusion in the hybrid compound at various scan *** situ X-ray diffraction is also performed to further demonstrate the structural evolution of the hybrid cathode during the charge/discharge process.

关键词： Lithium Batteries Cathode Anion De-/Intercalation Graphite Li Mn0.7Fe0.3PO4

Weakly-solvating electrolytes enable ultralow-temperature (-80°C) and high-power CF_(x)/Li primary batteries

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Science China Chemistry 2023年第7期66卷 1982-1988页

作者： Hao-Jie Liang Meng-Yuan Su Xin-Xin Zhao zhen-yi gu Jia-Lin Yang Wei guo Zhi-Ming Liu Jing-Ping Zhang Xing-Long Wu MOE Key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Department of Chemistry Northeast Normal UniversityChangchun 130024China Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal UniversityGan Zhou 341000China Qingdao University of Science and Technology Qingdao 260061China

Fluorinated carbons(CF_(x))/Li primary batteries with high theoretical energy density have been applied as indispensable energy storage devices with no need for rechargeability,yet plagued by poor rate capability and narrow temperature adaptability in actual ***,benefiting from precise solvation engineering for synergistic coordination of anions and low-affinity solvents,the optimized cyclic ether-based electrolyte is elaborated to significantly facilitate overall reaction dynamics closely correlated to lower desolvation *** a result,the excellent rate(15 C,650 mAh g^(-1))at room-temperature and ultra-lowtemperature performance dropping to-80°C(495 mAh g^(-1)at average output voltage of 2.11 V)is delivered by the end of 1.5 V cut-off voltage,far superior to other organic liquid ***,the CF_(x)/Li cell employing the high-loading electrode(18-22 mg cm^(-2))still yields 1,683 and 1,395 Wh kg^(-1)in the case of-40°C and-60°C,*** short,the novel design strategy for cyclic ethers as basic solvents is proposed to enable the CF_(x)/Li battery with superb subzero performances,which shows great potential in practical application for extreme environments.

关键词： CF_(x)/Li primary batteries solvation engineering desolvation barrier ultra-low temperature

Prospects for managing end-of-life lithium-ion batteries:Present and future

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Interdisciplinary Materials 2022年第3期1卷 417-433页

作者： Xiao-Tong Wang zhen-yi gu Edison Huixiang Ang Xin-Xin Zhao Xing-Long Wu yichun Liu MOE Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchunJilinChina Natural Sciences and Science Education National Institute of EducationNanyang Technological UniversitySingaporeSingapore Department of Chemistry Northeast Normal UniversityChangchunJilinChina

The accelerating electrification has sparked an explosion in lithium-ion batteries(LIBs)*** the lifespan declines,the substantial LIBs will flow into the recycling market and promise to spawn a giant recycling ***,since the lack of unified guiding standard and nontraceability,the recycling of end-of-life LIBs has fallen into the dilemma of low recycling rate,poor recycling efficiency,and insignificant ***,tapping into summarizing and analyzing the current status and challenges of recycling LIBs,this outlook provides insights for the future course of full lifecycle management of LIBs,proposing gradient utilization and recycling-target predesign ***,we acknowledge some recommendations for recycling waste LIBs and anticipate a collaborative effort to advance sustainable and reliable recycling routes.

关键词： gradient utilization lithium-ion batteries predesign recycling