JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaoming Yu,Weixin Chen,Junjie Cai,Xia Lu,Zhipeng Sun
A modified separator for improving the electrochemical performance in Li-S batteries is fabricated by functional composites coating, comprised of MnO nanoflakes with rich oxygen vacancies and N doped carbon nanotubes (MnO-OVs/NCNTs). On the one hand, MnO as a polar material can anchor lithium polysulfides (LiPSs) on the interface via chemical bonding. In addition, introducing oxygen vacancies into MnO by heat treatment under a reducing atmosphere can regulate the electronic structure and provide extra active sites for further boosting the chemical adsorption capability of LiPSs, facilitating the redox reaction of LiPSs, as well as enhancing the electron transfer efficiency. On the other hand, the MnO-OVs/NCNTs layer is a barrier to block the LiPSs directly diffusing through the separator and acts as an upper collector to reduce the interface resistance reactivate the trapped sulfur species, thereby enhancing the sulfur utilization. Given these advantages, the MnO-OVs/NCNTs modified separator employed in Li-S batteries exhibit considerable capacity (1516 mAh g −1 at 0.1C), enhanced long-term cycling stability (capacity retention of 618 mAh g −1 for over 500 cycles at 1C), and rate performance (550 mAh g −1 at 3C).
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DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 5
·2053-2066
·
IF 9.6
Lai Jia-Mei,Zou Zhi-Min,Bai Yu,Xing Yu-Tao,Jiang Chun-Hai
Surface modification of graphite anode with electroactive matters has been proven of a more practical strategy in enhancing the performance of Li-ion batteries than exploring alternative novel anode materials. Herein, rutile TiNbO 4− x nanoparticles with a tunnel structure are employed as multifunctional decoration substances in combination with a carbon coating layer to improve the rate and cycle properties of mesocarbon microbeads (MCMBs). As compared to pristine MCMB, the Li + diffusion coefficients of the composite anodes are enhanced due to the synergistic effect of TiNbO 4− x @C. Meanwhile, the overcharge and voltage polarization of the composite anodes at high rate are obviously minimized due to the current sharing effect of the high-potential TiNbO 4− x . Moreover, the amorphous Li y TiNbO 4− x converted from TiNbO 4− x in the initial lithiation process can deliver pseudocapacitive capacity to the composite anodes from the second cycle. All of these functions of TiNbO 4− x @C coating layer have directly contributed to the improved rate and cycle performance of the MCMB/TiNbO 4− x @C composite anodes. The one containing 12.0 wt% TiNbO 4− x exhibits a high reversible specific capacity of 118 mAh·g −1 at 10C (1C = 372 mA·g −1 ), together with a high capacity retention of 90.9% after 300 cycles at 3C, which are all much superior to those of pristine MCMB. Graphical abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Gui-lin Zhuang,Yi-fen Gao,Xiang Zhou,Xin-yong Tao,Jian-min Luo,Yi-jing Gao,Yi-long Yan,Pei-yuan Gao,Xing Zhong,Jian-guo Wang
Herein we report a facile bottom-up strategy to prepare highly dispersed supported Co 3 O 4 on N-doped Porous Carbon (NPC). Specifically, ZIF-67 (ZIF = Zeolitic Imidazolate Frameworks) microcrystals firstly grow on benzoic acid modified covalent organic framework (BFC), resulting in ZIF-67/COF composite. Subsequently, highly dispersed Co 3 O 4 /NPC was obtained via the calcination of ZIF-67/COF. Interestingly, high dispersion of supported Co 3 O 4 is dominated by homogeneous distribution of benzoic acid auchoring on nanoporous COF . More notably, largely triggered by the porosity and confining effect of COF , the resultant Co 3 O 4 /NPC features highly active crystal plane and a large specific surface area of 228.0 m 2 /g. Furthermore, the oxygen evolution reaction (OER) measurement results demonstrated that highly dispersed Co 3 O 4 /NPC features good catalytic activity (330 mV overpotential at 10 mA.cm −2 , 79 mV.dec −1 Tafel slope and mass activity of 130 A.g −1 at overpotential of 400 mV) and durable stability, superior to currently available counterparts. Moreover, Li-ion battery (LIB) tests also showed high reversible capacity (785 mA.h.g −1 at 500 mA.g −1 ) as well as excellent cycling stability and rate performance. Furthermore, Density functional theory (DFT) calculation results demonstrated that these superior OER properties can be attributed to the geometrical and electronic effects of Co 3 O 4 /NPC on activation and adsorption/desorption of reaction species.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jing Sun,Cai-ling Liu,Hong-bo Huang,Xiao-hong Liu,Mei-lan Xie,Ling-ling Liu,Jun-tong Huang,Dui Ma,Zhi-yuan Wang,Shao-hua Luo,Xiao Liang
Layered metal oxides have attracted significant research interest as potential cathode materials for sodium-ion batteries (SIBs), primarily owning to their excellent energy density characteristics and economic viability. Nonetheless, the durability of these materials is limited due to irreversible phase transformations and redox reactions involving lattice oxygen, especially under high-voltage conditions. This results in progressive structural collapse and accelerated capacity degradation. In this study, an innovative three-in-one design approach that combines "high-entropy, dual-phase and Li doping" for layered cathodes is proposed. The study elucidates that the combination of a dual-phase and high-entropy structure effectively improves structural integrity and cycling stability. Furthermore, Li doping promotes the redox reaction of cationic ions and facilitates charge compensation, thereby improving the capacity. The prepared cathode material, P2/O3-Na 0.7 Mn 0.4 Ni 0.27 Li 0.03 Cu 0.1 Fe 0.1 Ti 0.1 O 2 , delivers a high capacity of 139 mAh g −1 , stable cycling capability, superior rate performance (79.1 mAh g −1 at 2000 mA g −1 ) and enhanced air stability. In a full cell configuration combining a high-entropy cathode and a hard carbon anode, outstanding electrochemical performance is demonstrated, with a capacity of 138.4 mAh g −1 and an energy density of 410 Wh kg −1 . This work proposes a novel design strategy for high-performance SIBs.
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产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Yongsheng Chen,Siman Yang,Jianbin Zheng,Mingwei Hu,Mingdeng Wei,Peixun Xiong
As an excellent cathode material, lithium iron phosphate (LiFePO 4 ) has been widely used in commercial lithium-ion batteries (LIBs). However, the impact of synthetic conditions on LiFePO 4 cathode derived from amorphous iron phosphate (FePO 4 ) remains underexplored. In the present study, the effects of Li/P molar ratio on the crystallinity and electrochemical properties of LiFePO 4 were investigated in detail using FePO 4 as a precursor. When the Li/P molar ratio in LiFePO 4 was approximately 1, the material exhibited an excellent long-term cycling stability with a high capacity retention of 97 % after 500 cycles. In addition, multiple characterizations demonstrate that the higher molar ratio of the Li/P resulted in the higher concentration of defects in LiFePO 4 crystals, which not only reduced the reversible capacity but also compromised the structural stability, leading to a poor cyclic stability and quick capacity degradation. Therefore, such a work could provide a scientific insight for rational design and synthesis of high-performance LiFePO 4 cathodes from amorphous FePO 4 precursor.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiankun Lin,Chengwei Ma,Chunli Li,Xinyi Zou,Wen Chen,Jiangqi Zhou,Peichao Lian
Anode-free Li metal batteries are an excellent choice for developing the next generation of high-energy-density battery systems. However, due to poor chemical compatibility between the current collector and electrolyte interface, the Li electrodeposition on current collectors faces a huge challenge of rapid capacity degradation in anode-free Li metal batteries. Herein, a strategy for modifying an ultrathin black phosphorene (BP) mixed ion/electron conductor interface layer on the surface of a current collector by relying on pressure is proposed. The BP hybrid interface layer is formed in situ on the surface of the current collector solely by pressure compared with traditional current collector modification technology, and there is no powder shedding phenomenon in the absence of a binder. Moreover, the Cu-NCM811 cell matched with high mass loading cathodes exhibits excellent capacity retention and an average Coulombic efficiency of 99.1%. The relevant result has established the foundation for the development of long cycling anode-free Li metal batteries.
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 38
·26076-26082
·
IF 10.7
Haifeng Yu,Erdong Zhang,Jinxun Yu,Songmin Yu,Yaoguo Fang,Ling Chen,Hao Jiang,Chunzhong Li
Olivine-type LiMnxFe1−xPO4 (LMFP, 0 < x < 1) is poised to supplant LiFePO4 cathode materials with a ∼20% energy-density increase for Li-ion batteries (LIBs). However, its intrinsic low conductivities and MnO6 octahedral unit-cell Jahn–Teller distortion limit its power capability and cycling life. Herein, we report a Mg/Ni dual-doped and carbon-coated LMFP micro-sized secondary sphere with greatly enhanced reaction kinetics and superior structure stability. Ni2+ reduces the average valence state of Mn ions to alleviate Jahn–Teller distortion by participating in charge compensation during charging while improving electronic conductivity together with carbon coating. Mg2+ with a smaller ion radius (65 pm) significantly widens the Li-ion transfer channel by extending Li–O bonds. The as-obtained LMFP cathodes increase reversible specific capacity by about 2.4 times at 5C compared with a pristine sample, reaching 115 mA h g−1. In a pouch-type full cell, 92% of its initial capacity is still maintained after 2000 cycles at 1C, demonstrating its attractive potential for practical application in high-power and long-life LIBs.
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高影响因子
Energy & Environmental Materials
·
2025
·
IF 14.1
Junjie Huo,Chunxi Hai,Yanxia Sun,Shengde Dong,Luxiang Ma,Xin He,Qi Xu,Yuan Zhou
Owing to its excellent eco-friendliness and facile water elution properties, aluminum-based lithium adsorbents have attracted a surge of interest for selectively extracting Li + from Salt Lake brines, which account for more than 60% of the global lithium resources. However, structural collapse, facile deactivation during desorption process, and ultra-low actual adsorption capacity limit its further large-scale application, particularly in low-grade sulfate-type brines. Herein, considering its advantages, limitations, and structural features, the structural collapse of the aluminum-based lithium adsorbent was effectively suppressed by the in situ intercalation of VO 3 − and V 2 O 7 4− into the interlayer of [LiAl 2 (OH) 6 ] + . Evidently, the initial adsorption capacity and α Mg Li $$ {\upalpha}_{\mathrm{Mg}}^{\mathrm{Li}} $$ of as-configured adsorbents powder are 14.96 mg g −1 and 192.42 in real sulfate-type West Taijinar Salt Lake brines following NaCl salts removal with 800 mg L −1 Li + and 9.56 g L −1 SO 4 2− . Furthermore, the initial and retained adsorption capacities of these novel adsorbents granulate in brines after 100 adsorption/desorption cycles are 26.68 and 10.36 mg g −1 , respectively, which are almost 10 times higher than those of industrially utilized products. Based on experiments and density functional theory calculations, the process and mechanism of anion intercalation control were preliminarily elucidated. Furthermore, research findings indicate that intercalated anions can influence not only interlayer interactions but also the backbone strength of LDH-type adsorbents. This work significantly overcomes the major utilization challenges of aluminum-based lithium adsorbents, thereby enabling the high-efficiency and stable extraction of Li + from low-grade brines, including sulfate-type brines.
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DOI
高影响因子
ChemSusChem
·
2024
·Vol. 17
·期 24
·e202400840
·
IF 7.5
Ruojian Ma,Yaning Liu,Ruyi Fang,Jun Zhang,Ya-Hui Wang,Hui Huang,Yongping Gan,Xinping He,Xinhui Xia,Wenkui Zhang,Yang Xia,Sen Xin
Unfavorable parasitic reactions between the Ni-rich layered oxide cathode and the sulfide solid electrolyte have plagued the realization of all-solid-state rechargeable Li batteries. The accumulation of inactive by-products (P 2 S x , S, PO x n − and SO x n − ) at the cathode-sulfide interface impedes fast Li-ion transfer, which accounts for sluggish reaction kinetics and significant loss of cathode capacity. Herein, we proposed an easily scalable approach to stabilize the cathode electrochemistry via coating the cathode particles by a uniform, Li + -conductive plastic-crystal electrolyte nanolayer on their surface. The electrolyte, which simply consists of succinonitrile and Li bis(trifluoromethanesulphonyl)imide, serves as an interfacial buffer to effectively suppress the adverse phase transition in highly delithiated cathode materials, and the loss of lattice oxygen and generation of inactive oxygenated by-products at the cathode-sulfide interface. Consequently, an all-solid-state rechargeable Li battery with the modified cathode delivers high specific capacities of 168 mAh g −1 at 0.1 C and a high capacity retention >80 % after 100 cycles. Our work sheds new light on rational design of electrode-electrolyte interface for the next-generation high-energy batteries. Graphical A uniform plastic-crystal electrolyte nanolayer is coated onto the surface of Ni-rich oxide cathode particles and serves as a buffer to effectively suppress the adverse phase transition, loss of lattice oxygen and interfacial parasitic reactions with a sulfide solid electrolyte at highly delithiated cathode, which contributes improved electrochemical performance of an all-solid-stare rechargeable Li battery.
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高影响因子
Batteries & Supercaps
·
2024
·Vol. 7
·期 6
·e202400075
·
IF 5.1
Yuanyuan He,Jiawen Tang,Xiao Huang,Xin Ao,Bingbing Tian
Solid polymer electrolytes (SPEs) are considered a promising solution to the safety problems of lithium-ion batteries (LIBs) using liquid electrolytes. However, the high crystallinity and low ionic conductivity hinder the practical application of SPEs. Herein, we design a composite solid polymer electrolyte with a dual fast Li + conducting pathway in bulk and interface by incorporating highly Li + conductive ceramic Li 6.4 Ga 0.2 La 3 Zr 2 O 12 (LGLZO) in polyethylene oxide (PEO)/Li–bis (trifluoromethanesulfonyl) imide (LiTFSI) system. Compared to Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO), LGLZO provides better Li + conductivity; therefore, a fast Li + conducting pathway will form in the bulk of LGLZO nanofillers. Besides, LGLZO nanofiller accelerates the dissociation of LiTFSI and benefits the transfer of free Li + through the SPEs near the LGLZO surface, forming another interface fast Li + conducting pathway in the SPEs. Benefits from the dual fast Li + pathway design, the composite electrolyte membrane with 15 wt % LGLZO nanoparticles presents a high ionic conductivity of 8.0×10 −4 S cm −1 at 60 °C. The Li−Li symmetric cells with optimized content LGLZO show good cycling stability (no short circuit even after 1000 h), and the all–solid Li/LiFePO 4 batteries exhibit excellent cycling performance (remained 154 mAh g −1 after 500 cycles at 0.2 C under 60 °C). Graphical The PEO–based composite solid electrolyte containing LGLZO particles has constructed fast Li + conduction dual channels at the interface between LGLZO blocks and LGLZO and PEO, and has excellent electrochemical performance. In addition, the safe, reliable and low–cost synthesis method provides a favorable pathway for the modification of solid–state polymer electrolytes.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 23
·14539-14544
·
IF 3.269
Chao Li,Haochen Tan,Jingfang Pei,Chuan Wang,Cong Fan,Fangyi Huang,Bei Cao,Minghui Hao,Yuanxun Li,Zhihong Wang,Jingze Li
A novel polymer (PTPBQ) with alternating terephthalate (TP) and benzoquinone (BQ) moieties is synthesized for the first time as an organic cathode for Li-ion batteries. Both TP and BQ moieties probably could remain electrochemically active and thus may make PTPBQ realize a maximum 4-electron redox behaviour and a theoretical specific capacity of up to ∼390 mAh g−1. In its practical application, Li-ion half cells based on PTPBQ can realize discharge capacities of ∼110 mAh g−1 on average for 400 cycles (40 mA g−1, 0.1C), and ∼180 mAh g−1 on average for 200 cycles (80 mA g−1, 0.2C) when the carbon additive is augmented to 40 wt%.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Wenbo Li,Jinyang Dong,Yong Zhao,Jiayu Zhao,Haoyu Wang,Ning Li,Yun Lu,Jianan Hao,Yujia Wu,Youyou Fang,Yali Li,Qiongqiong Qi,Yuefeng Su,Feng Wu,Lai Chen
Li-rich Mn-based (LMR) layered oxides are considered promising cathode materials for high energy–density Li-ion batteries. Nevertheless, challenges such as irreversible oxygen loss at the surface during the initial charge, alteration of the bulk structure, and poor rate performance impede their path to commercialisation. Most modification methods focus on specific layers, making the overall impact of modifications at various depths on the properties of materials unclear. This research presents an approach by using doping to adjust both surface and bulk properties; the materials with surface and bulk fluoride anion doping are synthesised to explore the connection between doping depth, structural and electrochemical stability. The surface-doped material significantly improves the initial Coulombic efficiency (ICE) from 77.85% to 85.12% and limits phase transitions, yet it does not enhance rate performance. Conversely, doping in bulk stands out by improving both rate performance and cyclic stability: it increases the specific discharge capacity by around 60 mAh g −1 and enhances capacity retention from 57.69% to 82.26% after 300 cycles at 5C. These results highlight a notable dependence of material properties on depth, providing essential insights into the mechanisms of surface and bulk modifications.
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高影响因子
危险品化学品经营许可证（带存储）