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Outstanding performances of graphite||NMC622 pouch cells enabled by a non-inert diluent

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能源化学:英文版 2023年第6期81卷 593-602,I0013页

作者： Qinqin Cai Hao Jia Guanjie li Zhangyating Xie Xintao Zhou Zekai Ma lidan Xing Weishan li Engineering Research Center of MTEES(Ministry of Education) Research Center of BMET(Guangdong Province)Engineering Lab.of OFMHEB(Guangdong Province)Key Lab.of ETESPG(GHEI)and Innovative Platform for ITBMD(Guangzhou Municipality)School of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina

Although high salt concentration electrolyte(HCE)can construct effective li F-rich interphase film and solve the interphasial instability issue of graphite anode,its high cost,high viscosity and poor wettability with electrode materials limit its large-scale application.Generally,localized high concentration electrolyte(LHCE)is obtained by introducing an electrochemically inert diluent into HCE to avoid the above-mentioned problems while maintaining the high interphasial stability of HCE with graphite anode.Unlike traditional inert diluents,1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluropropyl ether(TTE)with electrochemical activity is introduced into propylene carbonate(PC)-based HCE to obtain LHCE-2(1 M liPF_(6),PC:DMC:TTE=1:1:6.1)herein.Experimental and theoretical simulation results show that TTE participates in the oxidation decomposition and film-forming reaction at the NCM622 cathode surface,conducting a cathode electrolyte interphase(CEI)rich in organic fluorides with excellent electron insulation ability,high structural stability and low interphasial impedance.Thanks to the outstanding interphasial properties induced by LHCE-2,the graphite||NMC622 pouch cell reaches a capacity retention of 80%after 500 cycles at 1 C under room temperature.While at sub-zero temperatures,the capacity released by the cell with LHCE-2 electrolyte is significantly higher than that of HCE and conventional EC-based electrolytes.Meanwhile,the LHCE-2 electrolyte inherits the advantages of TTE flame-resistant,thus improving the safety of the battery.

关键词： lithium-ion batteries Propylene carbonate Localized high-concentration electrolyte Non-Inert diluent Graphite||NMC622 pouch cells

Highly improved cyclic stability of Ni-rich/li batteries with succinic anhydride as electrolyte additive and underlying mechanism

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Journal of Energy Chemistry 2023年第3期78卷 80-90,I0003页

作者： Shu Yang Guanjie li Xiaoyan lin Changyong Mo Xianggui Zhou lijiao Quan Kuan Zhou Suli li Hai Wang Weishan li School of Chemistry South China Normal UniversityGuangzhou 510006GuangdongChina Zhuhai CosMX Battery Co. LtdZhuhai 519180GuangdongChina National and Local Joint Engineering Research Center of MPTES in High Energy and Safety liBs Engineering Research Center of MTEES(Ministry of Education)and Key Lab.of ETESPG(GHEI)South China Normal UniversityGuangzhou 510006GuangdongChina

lithium-metal battery based on Ni-rich cathode provides high energy density but presents poor cyclic stability due to the unstable electrode/electrolyte interfaces on both cathode and anode.In this work,we report a new strategy to address this issue.It is found that the cyclic stability of Ni-rich/li battery can be significantly improved by using succinic anhydride(SA) as an electrolyte additive.Specifically,the capacity retention of liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)/li cell is improved from 14% to 83% after 200cycles at 1 C between 3.0 and 4.35 V by applying 5% SA.The underlying mechanism of SA contribution is understood by comparing the effects of malic anhydride(MA) and citraconic anhydride(CA), both of which share a similar molecular structure to SA but show different effects.On anode side,SA can but MA and CA cannot form a protective solid electrolyte interphase(SEI) on li anode.On cathode side,three anhydrides can suppress the formation of hydrogen fluoride from electrolyte oxidation decomposition,but SA behaves best.Typically,MA shows adverse effects on the interface stability of li anode and NCM811 cathode,which originates from its high acidity.Though the acidity of MA can be mitigated by substituting a methyl for one H atom at its C=C bond,the substituent CA cannot compete with SA in cyclic stability improvement of the cell,because the SEI resulting from CA is not as robust as that from SA,which is related to the binding energy of the SEI components.This understanding reveals the importance of the electrolyte acidity on the Ni-rich cathode and the robustness of the SEI on li anode,which is helpful for rationally designing new electrolyte additives to further improve the cyclic stability of high-energydensity Ni-rich/li batteries.

关键词： lithium-metal battery Ni-rich cathode Electrolyte additives Succinic Anhydride Cyclic stability

Practical assessment of the energy density of potassium-ion batteries

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Science China Chemistry 2024年第1期67卷 4-12页

作者： liang Sun Guanjie li Shilin Zhang Sailin liu Jodie Yuwono Jianfeng Mao Zaiping Guo School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia

1 Introduction The evolution of modern human society closely depends on affordable,efficient,and safe energy storage systems.Today,lithium-ion batteries(liBs)are the dominant energy storage systems to power portable e... 详细信息

关键词： energy lithium smart

Recent progress in electrolyte design for advanced lithium metal batteries

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SmartMat 2023年第5期4卷 1-29页

作者： Mingnan li Caoyu Wang Kenneth Davey Jingxi li Guanjie li Shilin Zhang Jianfeng Mao Zaiping Guo School of Chemical Engineering&Advanced Materials The University of AdelaideAdelaideAustralia

lithium metal batteries(LMBs)have attracted considerable interest for use in electric vehicles and as next-generation energy storage devices because of their high energy density.However,a significant practical drawback with LMBs is the instability of the li metal/electrolyte interface,with concurrent parasitic reactions and dendrite growth,that leads to low Coulombic efficiency and poor cycle life.Owing to the significant role of electrolytes in batteries,rationally designed electrolytes can improve the electrochemical performance of LMBs and possibly achieve fast charge and a wide range of working temperatures to meet various requirements of the market in the future.Although there are some review papers about electrolytes for LMBs,the focus has been on a single parameter or single performance separately and,therefore,not sufficient for the design of electrolytes for advanced LMBs for a wide range of working environments.This review presents a systematic summary of recent progress made in terms of electrolytes,covering the fundamental understanding of the mechanism,scientific challenges,and strategies to address drawbacks of electrolytes for high-performance LMBs.The advantages and disadvantages of various electrolyte strategies are also analyzed,yielding suggestions for optimum properties of electrolytes for advanced LMBs applications.Finally,the most promising research directions for electrolytes are discussed briefly.

关键词： anion-derived SEI fast charge liquid electrolyte design lithium metal batteries safe electrolytes wide working temperature

New PM, Old 'Prescription'?

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Beijing Review 2022年第37期65卷 28-29页

作者： li guanjie the Center for British Studies at the Shanghai Academy of Global Governance and Area Studies Shanghai International Studies University

On September 5, the UK’s Foreign Secretary liz Truss prevailed in a two-month race to succeed Boris Johnson as Conservative Party leader and the next day she was formally appointed by Queen Elizabeth Ⅱ in Scotland as the UK’s new prime minister.Her victory came as no surprise. Truss proved a favorite in the polls ever since the last two candidates were confirmed and she maintained a large lead over her rival—former Chancellor of the Exchequer Rishi Sunak.

关键词： favorite formally maintained

Functionality analysis of an urban water supply network after strong earthquakes

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Earthquake Engineering and Engineering Vibration 2021年第2期20卷 291-302页

作者： li Jichao Shang Qingxue Hou guanjie li Quanwang Wang Tao Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake AdministrationHarbin 150080China Department of Civil Engineering Tsinghua UniversityBeijing 100084China

An urban water supply network(WSN)is a crucial lifeline system that helps to maintain the normal functioning of modern society.However,the hydraulic analysis of a significantly damaged WSN that suffers from pipe breaks or leaks remains challenging.In this paper,a probability-based framework is proposed to assess the functionality of WSNs in the aftermath of powerful earthquakes.The serviceability of the WSN is quantified by using a comprehensive index that considers nodal water flow and nodal pressure.This index includes a coefficient that reflects the relative importance of these two parameters.The demand reduction(DR)method,which reduces the water flow of nodes while preventing the negative pressure of nodes,is proposed.The difference between the negative pressure elimination(NPE)method and the DR method is discussed by using the example of a WSN in a medium-sized city in China.The functionality values of the WSN are 0.76 and 0.99 when nodal pressure and nodal demands are used respectively as the index of system serviceability at an intensity level that would pertain to an earthquake considered to occur at a maximum level.When the intensity of ground motion is as high as 0.4 g,the DR method requires fewer samples than the NPE method to obtain accurate results.The NPE method eliminates most of the pipes,which may be unrealistic.

关键词： water supply network system serviceability hydraulic analysis negative pressure elimination benchmark city

Do Unfamiliar Text Orientations Affect Transposed-Letter Word Recognition with Readers from Different Language Backgrounds?

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Language and Semiotic Studies 2020年第3期6卷 112-131页

作者： lingling li guanjie Jia Soochow University China

Although accurate coding of letter or character identities and positions is very important for word recognition,it is well established that transposed-letter(TL)words or transposedcharacter(TC)words do not influence word processing.However,most previous studies mainly examined TL words presented horizontally from left to right and considered less whether the same effect would occur with unusual text orientations.This paper examines the issue of whether unfamiliar text orientations would affect TL word processing when words are presented vertically from top to bottom or bottom to top,horizontally from right to left,or extremely rotated by 90°or 180°.Moreover,this paper also looks at the issue of whether readers’previous language backgrounds(monolingual vs.bilingual)and language-specific text orientations(single reading direction vs.multiple text orientations)influence TL word processing in unfamiliar circumstances.Based on the most recent evidence,this paper is in favor of the abstract letter units account which proposes that the basis of orthographic coding in skilled readers is abstract representations.Furthermore,a reconsideration from a perspective of Saussure’s conceptions of the signified and the signifier is developed.In the end,two main directions of future research are suggested:first,to the realm of bilingual TL study,with the aim to specify the key reasons why bilinguals demonstrate mixed results under unfamiliar text orientations and second,to the realm of sentence reading,in order to specify how orthographic information can be processed across longer text units other than words.

关键词： text orientation transposed letter priming effects abstract representation

Sustainable and biocompatible Zn-based batteries

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National Science Review 2023年第4期10卷 8-9页

作者： guanjie He Ivan P.Parkin Department of Chemical Engineering University College London Christopher Ingold Laboratory Department of Chemistry University College London

Next-generation and functional batery technologies beyond the li-ion are emerging [1]. Sustainable and biocompatible bateries are needed for certain applications, including implantable medical devices [2]. Zinc-based ... 详细信息

关键词： ELECTROLYTE

Constructing crystalline homophase carbon nitride S-scheme heterojunctions for efficient photocatalytic hydrogen evolution

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Journal of Materials Science & Technology 2023年第30期161卷 220-232页

作者： Mimi Luo guanjie Jiang Min Yu Yupeng Yan Zhangjie Qin Yang li Qin Zhang Key Laboratory of Agricultural Resources and Ecology in Poyang Lake Watershed of Ministry of Agriculture and Rural Affairs in China College of Land Resource and EnvironmentJiangxi Agricultural UniversityNanchang 330045China

The number of photogenerated carriers involved in the photocatalytic reaction is one of the main factors influencing the photocatalytic activity,and constructing S-scheme heterojunctions can significantly en-hance the migration of photogenerated carriers,which is regarded as an effective method.In this study,Au nanoparticles(NPs)-supported crystallized heptazine/triazine-based carbon nitride(AHTCN)S-scheme heterojunction photocatalysts are successfully prepared by photoreduction methods.Except for the Au NPs function as an electron mediator,the experiment results and DFT calculations demonstrate that the Fermi energy level of crystallized heptazine/triazine-based heterojunction(HTCN)is pulled down after anchoring Au NPs,and thus the electron transfer path of HTCN changed from Type II-scheme to S-scheme.Owing to S-scheme heterojunction,the optimal AHTCN-2(2 wt.%Au loaded)exhibits the best photocat-alytic hydrogen evolution with a production rate of 715.2μmol h^(−1)g^(−1),which significantly outperforms that of the HTCN.This work delivers a new strategy for the construction of S-scheme heterojunctions.

关键词： Photocatalytic hydrogen evolution Graphitic carbon nitride S-scheme heterojunction Au nanoparticles Crystalline