CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yue Zou,Qizheng Zheng,Yonglin Tang,Yawen Yan,Shiyuan Zhou,Hong-Gang Liao,Yu Qiao,Jun Bao,Shi-Gang Sun
Increasing the nickel content in high-nickel LiNi x Co y Mn 1-x-y O 2 cathode materials (NCM) can boost their energy density. However, the consequence of rising Ni content in NCM consists in the heightened stress buildup, intensified irreversible phase transition and severe electrolyte decomposition, and consequently accelerating the battery’s degradation. In the current study, we have revealed that the 4-fluoro-N, N dimethylbenzenesulfonamide (FBSN) as an electrolyte additive can refrain the typical dehydrogenation of EC. Furthermore, a continuously repaired cathode electrolyte interphase (CEI) is designed elaborately on LiNi 0.9 Co 0.05 Mn 0.05 O 2 (NCM90) surface by employing the FBSN as a sustained-release electrolyte additive to enhance cycling stability of NCM90||Li cells. This CEI, composed of high mechanical strength LiF and benzene ring skeleton, along with conductive Li + moieties (S-rich and N-rich species), can be effectively self-repaired in time when damaged, reduce the interaction between the NCM90 and sensitive electrolyte, and mitigate the devastation to the NCM90 cathode surface. As a result, the NCM90||Li cells with 2 % FBSN-containing electrolyte delivers a capacity retention of 90.2 % after 200 cycles at 1C, and 83.1 % after 200 cycles even at higher voltage of 4.5 V, superior than that of Base electrolyte (70.0 % at 4.3 V and 68.0 % at 4.5 V). This study provides an engaging approach to design electrolytes for high-nickel cathodes by autonomously interfacial repair.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 8
·4479-4486
·
IF 2.4
Tang Anping,Chen Juedong,Xu Guorong,Song Haishen,Wang Jinglun,Chen Hezhang
Non-intercalation cathode materials based on nanocomposites of lithium fluoride and Li-free transition metal compounds have drawn attention as materials for fabricating the cathode of lithium ion batteries owing to their high theoretical specific capacities and high redox voltages. In the present study, a nanocomposite of MnO-LiF was in situ synthesized by a quick annealing at 500 °C for just 5 min using a mixture of ammonium fluoride, manganese acetate, and lithium acetate as precursor. The synthesized composite is investigated by X-ray diffraction, scanning electron microscopy, nitrogen sorption, and charge-discharge measurements. As a lithium-ion battery cathode, it delivers respectively an initial discharge-specific capacity of 170 mAh g −1 and a discharge-specific capacity of 137 mAh g −1 in the 50th cycle at a current rate of C/20, which is equivalent to a moderate capacity retention rate of 80.6%. The novel synthesis approach proposed offers access to electrochemically active composites of lithium fluoride and Li-free transition metal oxides.
研究领域:
材料科学
·
电化学
·
纳米复合材料
·
能源存储
·
锂离子电池
✓ 已验证
DOI
高影响因子
IONICS
·
2025
·Vol. 31
·期 9
·8961-8969
·
IF 2.6
Ning Liping,Sui Zhixing,Tang Anping,Liang Ziqin,Chen Hezhang,Song Haishen,Xu Guorong
Conversion reactions have made LiF-metal oxide (MO) composites with attractive specific capacities compelling candidates for the next generation of lithium-ion battery cathode materials. However, it is necessary for the high charge voltage (> 4.5 V) to drive the redox reaction of MOs and break a strong ionic bond between Li + and F − upon charge. It is a crucial way for decrease in the charge voltage to lower the activation energy barrier of the redox process between LiF and MOs. A novel conversion cathode LiF-V 2 O 3 system is proposed in this study. Unlike most of the previously reported LiF-MOs systems, the LiF-V 2 O 3 system can work at the lower charge cut off voltage of 4.3 V. It delivers a reversible specific capacity of 197 mAh g −1 at C/20 rate in the voltage range of 2–4.3 V. Cyclic voltammetry data suggest a dominant contribution of pseudocapacitance effect in the conversion reaction of the LiF-V 2 O 3 sample.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 4
·C197
·
IF 3.266
Gong Chen,Zhongning Shi,Jiangyu Yu,Junli Xu,Xianwei Hu,Zhaowen Wang,Bingliang Gao
The passivation of a graphite electrode in LiF–KF molten salt at 773 K was studied using cyclic voltammetry and electrochemical impedance spectroscopy. The anodic cyclic voltammogram showed that there are two oxidation current peaks at approximately 1.2 and 4.8 V vs. Pt quasi-reference electrode. We confirmed that carbon fluoride compounds are formed at the first current peak, while the last current peak was predominantly attributed to F2 evolution. The surfaces of the anodes used for electrolysis were analyzed at the potential of 1.0 V by X-ray photoelectron spectroscopy and Raman spectroscopy, and the anode atmosphere during the experiments was analyzed by gas chromatography. The results show that solid carbon fluoride compounds were formed in the graphite surface and no trace of gaseous carbon fluoride was detected. In addition, the active–passive transition of graphite electrode was observed in the EIS spectra recorded at 1.5 V. We confirmed the reason for the passivation of a graphite anode in LiF–KF molten salt: the formed carbon fluoride compounds layer blocks the transmission of F− anion from the electrolyte to the graphite electrode.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 48
·33905-33910
·
IF 3.9
Kai Huang,Jinxia Zhou,Huili Yang,Tianzheng Xie,Tu Lan,Suichang Ong,Heng Jiang,Yibo Zeng,Hang Guo,Ying Zhang
The Ni-rich NCM622 is a promising cathode material for future high energy lithium ion batteries, but unstable electrochemical performance of NCM622 hinder its large scale commercial application. The cycling peformance of nickel-rich LiNi0.6Co0.2Mn0.2O2 (NCM622) cathode materials can be improved by surface coating. Here, a one-step approach based on TiF4 is used to successfully manufacture modified NCM622 cathode materials with a TiO2–LiF coating. The TiO2–LiF coated NCM622 preserves 79.7% capacity retention which is higher than the pure NCM622 (68.9%) at 1C after 200 cycles within 2.7–4.3 V. This material serves as the cathode for lithium-ion batteries (LIBs). The uniform TiO2–LiF coating layer can alleviate structural degradation brought on by unfavorable side reactions with the electrolyte has been validated. TiO2–LiF coated on NCM622 cathode materials can be modified easily by one-step approach.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Ziru Feng,Mengmeng Yan,Tengfei Li,Wenjun Zhang,Chao Zhu
Lactoferrin (Lf) is closely associated with the growth of infants and children, and its recognition is imperative due to its rising application as a prevalent nutritional fortification in infant formula. In this study, an ssDNA aptamer was screened out that enabled sandwich recognition of Lf by forming an aptamer pair with another available aptamer. During the process, the reported aptamer (SeqT1.1) was selected as the substrateto be linked onto pre-blocked microplates for capturing Lf, followed by the addition of the ssDNA library, resulting in the formation of the sandwich complex of the “SeqT1.1/Lf/ssDNA library” that was subsequently collected for screening. After seven rounds, we discovered a new ssDNA aptamer (Seq6T) through a comprehensive analysis involving sequence frequency, secondary structures, homology, and sequence truncation, which helped address the binding interference between aptamer pairs with each other’s binding. The Seq6T demonstrated good specificity and low-nanomolar affinity by ELONA (K D , 12.59 nM) and CE-LIF (K D , 22.44 nM) assays, which illustrated the potential of applying that in both homogeneous and non-homogeneous environments. The sandwich recognition of “SeqT1.1/Lf/Seq6T” was further verified by molecular docking and ELONA, with a good detection limit of 18.35 nM. The aptamer pairs provided a considerable basis for accelerating the sandwich recognition applications towards Lf.
研究领域:
生物技术
·
分子生物学
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 23
·13830-13840
·
IF 10.7
Xia Hu,Yao Wang,Weiqian Guo,Yao Tian,Xiang Zhang,Feiyu Kang,Dong Zhou,Baohua Li
Garnet electrolyte-based solid-state lithium metal batteries (SLMBs) are attractive owing to their high energy density and high safety. However, garnet electrolytes are sensitive to humid air, forming Li2CO3-rich contaminants on the surface that trigger a high kinetic barrier and premature battery failure. Herein, a straightforward “waste-to-treasure” strategy is proposed to transform Li2CO3 on a Li6.4La3Zr1.4Ta0.6O12 (LLZTO) surface into LiF by solvent-free trifluoroacetic acid (TFA)-induced interfacial engineering. The as-formed LiF interfacial layer with electronically insulating nature effectively improves the interface wettability between the Li anode and LLZTO, reduces the interface resistance and produces a symmetric cell with an ultralong-lifespan of up to 10 000 h at 0.1 mA cm−2. Furthermore, the SLMB paired with the LiFePO4 cathode delivers a high capacity of 155.6 mA h g−1 at 0.5C and retains 78% of the initial capacity after 900 cycles. This study offers a facile strategy to overcome the limitations associated with surface impurities, addresses critical interface issues, and accelerates the practical application of garnet-type solid-state electrolytes in high-performance SLMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Joule
·
2025
·
IF 35.4
Yawei Chen,Menghao Li,Yulin Jie,Yue Liu,Zhengfeng Zhang,Peiping Yu,Wanxia Li,Yang Liu,Xinpeng Li,Zhanwu Lei,Pengfei Yan,Tao Cheng,M. Danny Gu,Shuhong Jiao,Ruiguo Cao
High-voltage lithium (Li) metal batteries (HVLMBs) have attracted tremendous research interest in the past decade owing to their high energy densities. Electrode-electrolyte interphases in HVLMBs play critical roles in dictating their electrochemical performance. However, despite the intensive research on solid-electrolyte interphase (SEI) of Li anode, the cathode-electrolyte interphase (CEI) on high-voltage cathodes remains elusive. Herein, we report the formation and dynamic evolution of CEI on LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) cathodes in ether-based electrolytes. We reveal that the solvent-derived interphase predominates the initial CEI, which subsequently evolves into a Li fluoride (LiF)-rich CEI during cycling. Through solvent design, the weak-solvation electrolyte with branched ether solvents promotes the formation of a conformal CEI layer featuring the monodispersing LiF nanocrystals (∼8 nm), thereby enabling NMC811 cathodes to sustain up to 2,000 cycles. This work addresses the long-standing questions regarding CEI evolution and provides valuable guidance for the rational electrolyte design for HVLMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Xifan Chen,Yuanzhi Zhu,Miao Zhang,Jinyi Sui,Wenchao Peng,Yang Li,GuoLiang Zhang,Fengbao Zhang,Xiaobin Fan
MXenes, a family of two-dimensional (2D) transition-metal carbide and nitride materials, are supposed to be promising pseudocapacitive materials because of their high electronic conductivity and hydrophilic surfaces. MXenes, prepared by removing the “A” elements of their corresponding MAX phases by hydrofluoric acid (HF) or LiF–HCl etching, possess abundant terminal groups like −F, −OH, and −O groups. It has been proven that the MXenes with fewer −F terminal groups and more −O groups showed a higher pseudocapacitor performance. In organic reactions, −OH and −X (X = halogen) groups could turn to ether groups in strong nucleophilic reagent. Inspired by that, herein, we report an n-butyllithium-treated method to turn the −F and −OH terminal groups to −O groups on the Ti3C2Tx MXenes. Two types of Ti3C2Tx MXenes prepared by either HF or LiF–HCl etching were systematically investigated, and a comparison with the traditional KOH/NaOH/LiOH-treated method was also carried out. It is found that most of the −F terminal groups on the Ti3C2Tx MXenes can be successfully removed by n-butyllithium, and abundant −O terminal groups were formed. The n-butyllithium-treated Ti3C2Tx MXenes show promising applications in high-performance pseudocapacitors. A record high capacitance of 523 F g–1 at 2 mV s–1 was obtained for the n-butyllithium-treated Ti3C2Tx MXenes, and 96% capacity can remain even after 10 000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF HISTOCHEMISTRY
·
2022
·
IF 1.966
Haixia Li,Ning Su,Yaqiao Zhu,Wei Wang,Meihong Cai,Xiaohuan Luo,Wei Xia,Song Quan
Recurrent implantation failure (RIF) is defined as failure to achieve clinical pregnancy after at least 3 transfers of good-quality embryos by natural or artificial means. RIF is often a complex problem with a wide variety of etiologies and mechanisms as well as treatment options. In this study, using immunohistochemistry and Western blot, we demonstrated that the expression of leukemia inhibitory factor (LIF), Janus kinase 1 (JAK1), and signal transducer and activator of transcription 3 (STAT3) was increased, while that of suppressor of cytokine signaling 1 (SOCS1) was decreased in RIF patients. Growth hormone (GH) administration proved to have positive effects on embryo implantation in RIF patients, but the action mechanism of GH has not been elucidated yet. To this aim, we studied the effects of GH on the proliferation in vitro of endometrial adenocarcinoma Ishikawa cells. GH stimulated the expression of LIF and SOCS1, and through SOCS1 inhibits the expression of phosphorylated STAT3, and finally inhibits the occurrence of RIF. Excessive phosphorylation of STAT can lead to decreased endometrial receptivity and abnormal embryo implantation. We also examined the effects of LIF overexpression and an LIF inhibitor (EC330) on the JAK/STAT pathway. LIF promoted cell proliferation, and the up-regulation of LIF increased the expression of SOCS1 and JAK1/STAT3 pathway-related genes in Ishikawa cells. As GH can inhibit the JAK1/STAT3 pathway through LIF, we hypothesize that upregulating SOCS1 may be a potential approach to treat RIF at the molecular level. GH can inhibit the JAK1/STAT3 pathway through LIF, up-regulating SOCS1 to treat RIF at the molecular level.
研究领域:
生殖生物学
·
分子生物学
·
内分泌学
✓ 已验证
DOI
PubMed
高影响因子
Nano Energy
·
2017
·
IF 12.343
Zhe Peng,Ning Zhao,Zhenggang Zhang,Hao Wan,Huan Lin,Meng Liu,Cai Shen,Haiyong He,Xiangxin Guo,Ji-Guang Zhang,Deyu Wang
Although Li metal has been regarded as one of the most promising anode materials , an unstable Li/electrolyte interface during the cycling process seriously limits its practical application in rechargeable batteries. Herein, we report a transplantable LiF-rich layer (TLL) that can suppress the side reactions between electrolyte and lithium metal. This peelable layer cross-linked by nanoscale LiF domains is obtained by electrochemically reducing NiF 2 electrodes and could be used to protect Li metal anodes . Cu-Li cells using the TLL protection can operate for more than 300 cycles with a Coulombic efficiency as high as ~ 98% in carbonate-based electrolytes. In Li-LiFePO 4 cells, lithium metal with a TLL still looks shiny after 1000 cycles (~ 6 months) in contrast to the black surface of bare lithium foil after ~ 500 cycles (~ 3 months). These results clearly demonstrate that the TLL could greatly limit the side reactions between lithium metal and the carbonate-based electrolytes, and may enable long-term stable operation of Li metal batteries .
研究领域:
材料科学
·
电化学
·
储能技术
·
锂金属电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mei Li,Zhixiang Shan,Rugeng Liu,Meng Zhang,Wei Han
The electrochemical investigation of Ce(III) was carried out on W, Sn film and liquid Sn electrodes in LiF-LiCl eutectic by a variety of electrochemical methods. It was determined that Ce(III) was reduced to metallic Ce on W electrode via a one-step three-electron transfer, which was a reversible process controlled by diffusion. The diffusion coefficient of Ce(Ⅲ) in LiF-LiCl eutectic was estimated by CV and CP, while the diffusion activation energy was calculated to be 20.86 kJ mol −1 and 20.95 kJ mol −1 , respectively. The electrochemical behavior of Ce(Ⅲ) was studied on Sn film electrode by CV and OCP. Eight alloy compounds Ce x Sn were obtained due to the underpotential deposition of Ce on the pre-deposited Sn film electrode. The activities of Ce in Ce x Sn and standard Gibbs formation energies of Ce x Sn were evaluated, respectively. Moreover, on Sn film electrode, the electrochemical extraction of Ce was performed at −1.5 V. XRD, SEM and EDS results exhibited the formation of CeSn 3 and Ce 2 Sn 5 . On liquid Sn electrode, the reduction current of Ce appeared at about −1.2 V and reached a peak at about −1.4 V. The electrochemical extracting Ce was also conducted on liquid Sn electrode at −1.3 V and CeSn 3 was obtained. The extraction rates and efficiencies of Ce on liquid Sn electrode were estimated using ICP-AES at different durations. It was found that as the extraction proceeded, the extraction rate decreased, while the extraction efficiency increased. The extraction efficiency reached over 98 % after electrolysis for 10 h.
研究领域:
冶金学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）