Russian Journal of Physical Chemistry A
·
2017
·Vol. 91
·期 7
·1292-1300
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IF 0.581
Zhang Binbin,Li Yantao,Hou Baorong
Ionic solvation in solutions of lithium tetrafluoroborate (LiBF 4 ) in propylene carbonate (PC) + dimethyl sulfoxide (DMSO) mixtures has been studied using Fourier transformed infrared (FTIR) spectroscopy. Dimerization of DMSO molecules in the solutions was taken into account. The obtained results are discussed with respect to the electrolyte concentration and properties of the cations of the electrolyte. Band changes due to solvation interaction were detected in the region of the C=O stretching vibrations and ring deformation for PC, and the S=O stretching vibrations and C–S–C skeleton stretching modes for DMSO, indicating that there is a strong interaction between lithium cations and solvent molecules. In addition, Li + was preferentially solvated by DMSO in these binary solvents as a result of the large difference in their donor number (DN) values. The structures of PC, DMSO, Li + -PC, Li + -DMSO, and Li + -PC+DMSO were given.
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 44
·期 3
·3040-3047
·
IF 2.986
Chunhai Jiang,Weiqiang Ding,Huiqing Wu,Zhiyang Yu,Lili Ma,Zhimin Zou
A flexible, free-standing composite anode with Li 4 Ti 5 O 12 nanosheet arrays anchoring on plain-weaved carbon fiber cloth (LTO@CC) is prepared by a hydrothermal and post-annealing process assisted by a TiO 2 seed layer. The LTO@CC anode free from polymeric binder and conducting agent exhibited much higher lithium storage capacity and cycling stability than the conventional slurry-processed electrode using the dandelion-like Li 4 Ti 5 O 12 microspheres prepared by the same hydrothermal process. A high specific capacity of 128.8 mA h g −1 was obtained at a current rate of 30 C (1 C = 175 mA g −1 ), and almost negligible capacity loses was observed when the cell was cycled at 10, 20 and 30 C each for 100 cycles. The carbon fiber matrix contributed to Li storage at low current rate, but the LTO nanosheet arrays have played the dominant role on the excellent rate capability. The improved electrochemical performance can be attributed to the synergetic effect between the hierarchical Li 4 Ti 5 O 12 nanosheet arrays and the carbon fiber matrix, which integrated short Li + diffusion length , three-dimensional conductive architecture and well preserved structural integrity during the high rate and repeated charge-discharge measurements.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Chao-Ying Fan,Hai-Yan Yuan,Huan-Huan Li,Hai-Feng Wang,Wen-Liang Li,Hai-Zhu Sun,Xing-Long Wu,Jing-Ping Zhang
In this work, the lightweight and scalable organic macromolecule graphitic carbon nitride (g-C3N4) with enriched polysulfide adsorption sites of pyridinic-N was introduced to achieve the effective functionalization of separator at the molecular level. This simple method overcomes the difficulty of low doping content as well as the existence of an uncontrolled form of nitrogen heteroatom in the final product. Besides the conventional pyridinic–N-Li bond formed in the vacancies of g-C3N4, the C–S bond was interestingly observed between g-C3N4 and Li2S, which endowed g-C3N4 with an inherent adsorption capacity for polysulfides. In addition, the microsized g-C3N4 provided the coating layer with good mechanical strength to guarantee its restriction function for polysulfides during long cycling. As a result, an excellent reversible capacity of 840 mA h g–1 was retained at 0.5 C after 400 cycles for a pure sulfur electrode, much better than that of the cell with an innocent carbon-coated separator. Even at a current density of 1 C, the cell still delivered a stable capacity of 732.7 mA h g–1 after 500 cycles. Moreover, when further increasing the sulfur loading to 5 mg cm–2, an excellent specific capacity of 1134.7 mA h g–1 was acquired with the stable cycle stability, ensuring a high areal capacity of 5.11 mA h cm–2. Besides the intrinsic adsorption ability for polysulfides, g-C3N4 is nontoxic and mass produced. Therefore, a scalable separator decorated with g-C3N4 and a commercial sulfur cathode promises high energy density for the practical application of Li–S batteries.
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ACS Nano
·
2019
·
IF 13.903
Yuanjian Li,Chong Wang,Wenyu Wang,Alex Yong Sheng Eng,Mintao Wan,Lin Fu,Eryang Mao,Guocheng Li,Jiang Tang,Zhi Wei Seh,Yongming Sun
Rechargeable lithium–sulfur batteries have attracted tremendous scientific attention owing to their high energy density. However, their practical application is greatly hindered by the notorious shuttling of soluble lithium polysulfide (LPS) intermediates with sluggish redox reactions and uncontrolled precipitation behavior. Herein, we report a semiliquid cathode composed of an active LPS solution/carbon nanofiber (CNF) composite layer, capped with a carbon nanotube (CNT) thin film decorated with metallic Mo nanoclusters that regulate the electrochemical redox reactions of LPS. The trace amount (0.05 mg cm–2) of metallic Mo on the CNT film provides sufficient capturing centers for the chemical immobilization of LPS. Together with physical blocking of LPS by the compact CNT film, free diffusion of LPS is significantly restrained and the self-discharge behavior of the Li–S cell is thus effectively suppressed. Importantly, the metallic Mo nanoclusters enable fast catalytic conversion of LPS and regular deposition of lithium sulfide. As a result, the engineered cathode exhibits a high active sulfur utilization (1401 mAh g–1 at 0.1 C), stable cycling (500 cycles at 1 C with 0.06% decay per cycle), high rate performance (694 mAh g–1 at 5 C), and low self-discharge rate (3% after 72 h of rest). Moreover, a high reversible areal capacity of 4.75 mAh cm–2 is maintained after 100 cycles at 0.2 C for a cathode with a high sulfur loading of 7.64 mg cm–2. This work provides significant insight into the structural and materials design of an advanced sulfur-based cathode that effectively regulates the electrochemical reactions of sulfur species in high-energy Li–S batteries.
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DESALINATION
·
2026
·
IF 9.9
Xin Shi,Qiuyan Bi,Zizhen Peng,Zhicheng Wang,Yakai Lin,Wenzhong Ma,Chuanjie Fang,Chao Zhang,Shiai Xu
In situ SiO 2 growth with DA-g-C 3 N 4 co-doping yields hybrid crosslinked PA layer. • Compound strategy mitigates DA-g-C 3 N 4 aggregation in PA layer. • Achieved simultaneous gains in Mg 2+ /Li + selectivity and permeability performance. • MgCl 2 rejection stayed >93% over 160 h, demonstrating excellent long-term stability. It is often difficult for thin-film composite (TFC) nanofiltration (NF) membranes to balance high separation selectivity and high permeability, and the contradiction between the two will lead to their overall performance constraints. In this study, a dual-phase regulation strategy is proposed, which adopts the in-situ sol method and the composite strategy of introducing two-dimensional materials for the preparation of organic-inorganic cross-linked polyamide (PA) NF membranes. A trimesoyl chloride (TMC) organic phase solution containing tetraethyl orthosilicate was first introduced onto the polyethersulfone (PES) substrate, followed by contact with a polyethyleneimine (PEI) aqueous phase solution containing dopamine-functionalized carbon nitride (DA-g-C 3 N 4 ), during which silicon dioxide (SiO 2 )/Si–O–Si domains were generated in situ within the PA layer. These domains restricted the free volume of the PA layer, narrowed the effective pore-size distribution, and suppressed nonselective defects, while the embedded DA-g-C 3 N 4 improved the compatibility between the nanofillers and the PA layer, thereby producing P-1Si-0.025CN membranes with an effective pore size of 0.4 nm. Compared with the P-NF membrane prepared by reverse interfacial polymerization of TMC and PEI directly on the PES substrate, Mg 2+ /Li + separation factor (SF) increased to 67.2 (Mg 2+ /Li + mass ratio is 20), salt solution flux was 27.1 LMH, separation and permeation capacity of mixed salt was enhanced, salt solution flux has increased by 4 times, and the SF has increased by 7 times, Mg 2+ /Li + ratio decreased from 20 in feed to 0.71 in permeation process. Moreover, it exhibited excellent separation performance in diluted salt lake brine, with an Mg 2+ rejection rate exceeding 98%, and it also exhibited high fouling resistance and long-term stability. Download: Download high-res image (155KB) Download: Download full-size image
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·383
·
IF 38.5
Lei Peng,Wu Gang,Qi Xiang,Li Yang,Wu Meng,Ren Wanqing,Li Huan,Gao Lei,Zhou Dan,Fan Li-Zhen
Li-rich Mn-based oxide (LRMO) cathodes represent promising candidates for high-energy-density all-solid-state lithium batteries (ASSLBs). Nonetheless, irreversible oxygen release and sluggish transport kinetics result in faded voltage and degraded cycling stability, severely impeding their practical applications in ASSLBs. Herein, a high-quality artificial interface layer was constructed on the LRMO surface via a facile sol–gel method followed by thermal treatment, yielding a Li 3 ScF 6 protective layer comprising a Li 3 ScF 6 surface coating region and a subsurface Sc doping region. Specifically, Li 3 ScF 6 surface coating effectively suppresses continuous interfacial side reactions between the cathode and solid electrolyte, thereby improving interfacial transport kinetics; the strong Sc–O bond stabilizes the lattice oxygen framework and inhibits oxygen release, thereby enhancing the reversibility of the oxygen redox reaction. Consequently, the ASSLBs with the modified LRMO cathode exhibit remarkable fast-charging capability (136.8 mAh g −1 at 1.0 C) and excellent capacity retention (83.9% after 500 cycles at 0.3 C). In addition, the ASSLBs achieve outstanding long-term cycling stability at a high areal capacity of 4.17 mAh cm −2 , retaining 81.8% of its capacity after 300 cycles at 60 °C. This study offers new insights into the rational design of high-capacity and high-voltage LRMO cathode materials for high-energy-density ASSLBs.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Xi Zhang,Sheng Cao,Bing Wu,Haonan Zheng,Xianjun Zhu,Kunxiang Liu,Zhaoyu Zhai,Zhikai Zhou,Shuangying Wei,Zdeněk Sofer,Jing Xia,Yanqing Fu,Qiliang Wei,Weiyou Yang,Zhao Liang,Ruizhi Yu
Li-rich Mn-based layered oxides (LRMOs) rely on lattice oxygen redox to achieve high energy density, but their high-temperature performance is limited by thermally accelerated oxygen loss and interfacial degradation. Here, it is verified that trace-level entropy-mediated doping (Mg, Cu, Ti, and La) exerts a dual role in LRMOs. At low doping levels, it stabilizes the bulk layered framework and interfacial chemistry via synergistic lattice regulation and transition-metal–oxygen (TM–O) covalency tuning. However, excessive doping suppresses lattice-oxygen redox activity and exacerbates electrochemical polarization, ultimately compromising reversible capacity and reaction kinetics. At an optimal dopant level of 0.25 at. % relative to total transition-metal content, the entropy-mediated doping suppresses Li/Ni disorder, expands lattice spacing, and enhances structural durability without sacrificing oxygen-redox reversibility. Consequently, Li1.2Mn0.5985Ni0.1995Mg0.0005Cu0.0005Ti0.0005La0.0005O2 delivers a high discharge capacity of 274.99 mAh g–1 at 0.1 C and sustains 227.18 mAh g–1 at 1 C. More importantly, it achieves 84.57% capacity retention after 100 cycles at 55 °C, substantially surpassing the unmodified LRMOs (58.10%). This work establishes trace-level entropy-mediated regulation of TM–O chemistry as a practical strategy for thermally robust, high-energy oxygen-redox cathodes.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Hao Feng,Zipeng Sun,Yaoxin Li,Chengwei Ma,Jiangqi Zhou
Lithium metal batteries are the most promising representative for achieving high-energy-density battery systems. However, interface instability and lithium dendrite growth are important challenges facing large-scale applications. Polymer solid electrolytes have both the rigidity to suppress lithium dendrite growth and the toughness to accommodate interface fluctuations, making them a necessary path for the development of solid-state lithium metal batteries. Solid-state lithium metal batteries still have poor solid contact interfaces, which are affected by multiple effects of interface mechanics and electrochemistry. In this work, polyurethane with excellent mechanical properties was used as the substrate, and the cross-linking reaction of SiO2 aerogel was used to bridge polyurethane and polymethacrylate polymers, to investigate the influence mechanism of the mechanical-electrochemical characteristics of the interface of a solid electrolyte film on the Li+ interface dynamics. Through the synergistic effect of the fluorinated polar groups and silicon oxygen skeleton in the solid electrolyte film, the synergistic effects of increasing Young’s modulus, enhancing mechanical stiffness, and improving electrochemical stability and interface compatibility have been achieved, thus establishing the mechanism of the mechanical-electrochemical coupling characteristics of the solid electrolyte film on interface dynamics, providing a perspective for the practical application of polymer solid-state batteries.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yingli Zhang,Hailong Zhu,Huaiyang Zuo,Yaqi Hou,Shumin Zheng,Shiming Yang,Jing Wang,Bao Wang
As a potential high-safety and high-energy-density technology, lithium sulfide has been extensively studied as a cathode material for lithium–sulfur batteries under room temperature conditions. However, limited by its intrinsic characteristics of low electronic conductivity and high activation energy barrier, conventional Li2S cathodes struggle to overcome the activation energy barrier at low temperatures, resulting in scarce research on their application below zero. Specifically, studies on operation at −20 °C are nearly nonexistent. Herein, a synergistic strategy combining molybdenum carbide support adsorption and cobalt metal catalysis is proposed for low-temperature performance investigation. Via a lithiation reaction, Li2S@MoC–Co nanocomposites are fabricated by in situ synthesizing Li2S nanoparticles, introducing MoC as the support, and incorporating Co metal. When assembled into batteries with Li2S@MoC–Co as the cathode and metallic lithium as the anode, the activation energy barrier is reduced to 2.41 V at room temperature, exhibiting excellent electrochemical performance. A high initial discharge capacity of 1100 mAh g–1 is achieved at 0.1 C, and a discharge capacity of 430 mAh g–1 is retained after 200 cycles at 0.5 C. Even at −20 °C, Li2S is almost fully activated during the first charging cycle, delivering a discharge capacity of 360 mAh g–1 at 0.05 C. Moreover, a capacity retention rate of 92% is maintained after 300 cycles at 0.5 C. This work realizes high output and high-capacity retention of Li2S at −20 °C, providing a new paradigm for the development of low-temperature Li2S-based batteries.
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高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Caiyue Sun,Kanghou Ma,Yitao He,Ge Zhang,Guanghua Liu,Chen Wang,Fangshuo Zhou,Zhiguo Liu,Ningning Wu,Yaohui Zhang
Artificial protection layers (APLs) are an effective strategy to protect lithium metal anodes. Current research primarily focuses on applying APLs to the electrode surface where lithium deposition occurs. However, limited attention has been given to how adding APLs to the counter electrode surface impacts the performance of lithium metal batteries. In this study, we combine experimental and simulation approaches to investigate the effects of applying APLs either solely on the lithium deposition side or on both electrodes of the battery. Experimental results show that Li-LFP batteries cycled at 2 C without APLs exhibited a capacity retention below 80% after 245 cycles. When APLs were applied only to the lithium deposition side, the batteries could cycle for 464 cycles. Remarkably, when APLs were applied to both electrodes, the Li-LFP batteries retained over 80% capacity retention even after 800 cycles. These findings indicate that applying APLs to both the lithium deposition side and the counter electrode significantly enhances the electrochemical performance of the battery. This study breaks the current paradigm of focusing solely on the lithium metal electrode surface, providing valuable insights for the development of safer and higher-performance lithium metal anode battery systems in the future.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Xingbo Qi,Lei Ni,Ziyan He,Xu Sun,Hejie Lu,Haiqiang Li,Ruixi Meng,Maosen Fu,Xiao Ma
Cobalt-free, nickel-rich layered oxide cathode material LiNixMn1-xO2 (NM) has attracted much attention due to its high specific capacity and low cost. However, cobalt-free cathode materials have more serious problems such as Li/Ni disorder and structural degradation compared to ternary LiNixCOyMn1-x-yO2 (x ≥0.5, NCM) cathodes. To address these challenges, LiNi0.6Mn0.4O2 (NM64) and a series of Mo-doped Li(Ni0.6Mn0.4)(1-x)MoxO2 (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05) cathode materials were designed and prepared by high-temperature solid-phase method, and the effect of Mo doping on the structure and electrochemical performance of NM64 cathodes was systematically investigated. Mo doping not only suppresses Li/Ni mixing and enlarges interlayer spacing but also effectively inhibits primary particle overgrowth, resulting in refined particle morphology that enhances structural stability and Li+ transport kinetics. Consequently, the Mo-doped NMM cathodes exhibit more stable interface with significantly suppressed side reactions. Li(Ni0.6Mn0.4)0.98Mo0.02O2 cathode exhibited superior capacity retention of 86.83% after 100 cycles at 1.0 C (at 25℃ and 2.8-4.3 V), surpassing the NM matrix by 8.98% and demonstrating the remarkable cycling stability improvement. This work elucidates the structural and interfacial stabilization mechanisms induced by high-valent Mo doping, providing an effective approach to developing high-performance Co-free layered oxide cathodes.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yaning Du,Bing Zhu,Yangai Liu,Qingyu Zhang,LiMing Wu,Shengyu Yang,Zekun Wang
Provides a novel strategy utilizing mineral to synthesize high-performance sulfur host. • HNT@NC-MS 2 (M = Co, Ni, Fe) exhibit superior anchor and catalytic abilities for LiPSs. • HNT@NC-CoS 2 /S battery exhibit outstanding rate performance and cycle stability. • HNT@NC-CoS 2 shows broad application prospects in practical high-performance LSBs. Lithium-sulfur batteries (LSBs) are impeded by the shuttle effect arising from soluble lithium polysulfides (LiPSs) and the sluggish kinetics of sulfur redox reactions. To tackle these issues, we designed a ternary sulfur host comprising hollow tubular halloysite (HNT) coated with N‑doped carbon layer and decorated with transition metal sulfide (CoS 2 , NiS 2 , or FeS 2 ) nanoparticles via high‑temperature carbonization and in situ solvothermal synthesis. The hollow nanotubular structure of HNT provides space for sulfur loading and volume accommodation, the carbon shell ensures electrical conductivity, and the MS 2 nanoparticles offer polar sites for LiPSs chemisorption and catalytic conversion. Among the three sulfides, CoS 2 exhibits the strongest catalytic activity, particularly in accelerating the liquid‑phase conversion of long‑chain Li 2 S 8 to short‑chain Li 2 S 4 . Benefiting from this synergy, the HNT@NC-CoS 2 /S cathode delivers an initial capacity of 1018.4 mAh g −1 at 0.5 C with 81.5% retention over 200 cycles. At a high sulfur loading (3.5 mg cm −2 ) and a lean electrolyte-to-sulfur ratio (E/S ≈ 10 µL mg −1 ), the cell demonstrates high areal capacity of 3.1 mAh cm −2 after 50 cycles while delivering enough energy to illuminate an LED for approximately 30 min. This work provides a rational pathway for constructing adsorption‑catalytic integrated sulfur hosts and promotes the value‑added utilization of clay minerals in energy storage. Download: Download high-res image (282KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）