ACS Nano
·
2025
·
IF 16
Shengxi Li,Yanxin Shang,Xuening Ren,Anqi Zhao,Nan Chen,Li Li,Feng Wu,Renjie Chen
Aqueous lithium-ion batteries (ALIBs) have attracted increasing attention for their inherent safety and environmental benefits. However, the narrow electrochemical stability window of water (1.23 V) imposed by hydrogen evolution reaction (HER) and high melting point (0 °C) critically limits the energy density and low-temperature operation. In this work, we report an electrolyte design principle that water activity can be suppressed by strengthening the O–H bonds between water molecules and regulating the pH. A strong polar solvent N,N-dimethylformamide (DMF) interacts with H2O through intermolecular hydrogen bonds, thereby reinforcing the covalent O–H bonds of water. Meanwhile, KOH renders the electrolyte alkaline, inhibiting water dissociation kinetics and consequently raising the HER overpotential. The designed LD1.7W0.6–KOH electrolyte exhibits a freezing point below −82 °C and expanded electrochemical stability window of 4.3 V. The 2.5 V aqueous LiMn2O4/Li4Ti5O12 full cell delivers 2000 cycles at a rate of 6 C with a Coulombic efficiency of 99% at 30 °C and over 1950 cycles at 0 °C. This work offers atomic-level insights into alkaline HER while providing guidance for advancing low-temperature aqueous batteries by tuning the electrolyte structures.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Dongwei Zhou,Shihao Wang,Jiansen Wen,Jie Mei,Guiyang Gao,Saichao Li,Baisheng Sa,Jie Lin,Laisen Wang,Guoying Wei,Dong-Liang Peng,Qingshui Xie
Li-rich Mn-based cathode materials, single-solvent, nonflammable feature, high voltage stability, solvation structure
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Bao Shiwen,Ma Zhaoyu,Yu Lei,Li Qi,Xia Jiaxiang,Song Song,Sui Kunyan,Zhao Yongye,Liu Xueli,Gao Jun
Certain biological channels exhibit remarkable selectivity, effectively distinguishing between competing cations. If artificial membranes could achieve similar precision in differentiating competing ions from Li + , it could advance sustainable technologies in lithium extraction. In this study, we present a covalent organic framework (COF) membrane featuring a randomly oriented structure that enables selective separation of major competing ions from Li + . The random orientation results in narrow pores, which impart size-based selectivity among alkaline ions. Additionally, the COF incorporates sulfonic groups that preferentially bind to Na + and K + , facilitating their transport while retaining Li + . These synergistic mechanisms endow the membrane with a selectivity beyond detection limit for K + and Na + over Li + . When driven by an electrical potential, the ion flux through the membrane is enhanced by over an order of magnitude. Notably, the membrane also permits the transport of Mg 2+ and Ca 2+ while still rejecting Li + , leveraging differences in their ion mobility. This work should advance the design and construction of biomimetic materials for the extraction of valuable species from seawater and other aqueous sources.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tianzhi Jiang,Xuejiao Wang,Renguang Ye,Youjie Hua,Xinfeng Jin,Weigang Guo,Guoqing Liu,Zhiqiang Long,Buqing Zhang,Gongxun Bai,Junjie Zhang,Shiqing Xu
The quenching of luminescence in Er 3+ /Yb 3+ co-doped with Tm 3+ presents a dilemma as it substantially diminishes thermometric performance. In this study, Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ phosphors were synthesized using a homogeneous precipitation method combined with a sulfurization process. In addition, three sets of fluorescence intensity ratio (FIR) models were designed, which have self-calibration function. The effects of incorporation of Li + or Li + /Ba 2+ on the up-conversion luminescence (UCL) intensity and thermometric performance of the phosphors were systematically studied. The results show that the introduction of Li + or Li + /Ba 2+ co-doping leads to lattice distortion and the formation of oxygen ion vacancies in the lattice, which further accelerates the energy transfer process and mixes the charge transfer states , and ultimately dramatically improves the UCL and thermometric performance. The introduction of Li + and Li + /Ba 2+ co-doping enhanced the UCL of the materials by about 3.7 times and 5.6 times compared to Y 2 O 2 S: Er 3+ /Yb 3+ /Tm 3+ . When based on nonthermally coupled levels (NTCLs), the S r-max of Li + /Ba 2+ co-doped sample is 0.080 K −1 at 573 K, which is 87 % higher than that based on TCLs. These findings not only provide a new avenue for improving the UCL and thermometric performance but also provide an accurate self-calibration FIR model over a wide temperature range.
研究领域:
材料科学
·
光学
·
物理学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 5
·1-10
·
IF 2.8
Ye Huihua,Lin Jinfeng,Wang Xusheng
Three types of CaAl 2 O 4 :Li + phosphors singly doped with Eu 3+ , Sm 3+ , and Ho 3+ ions were synthesized using high temperature solid-state reaction method, and the effects of rare-earth ions and doping concentration on the crystal structure, thermal stability and luminescence properties were systematically studied. The XRD patterns show that all Ca 1 − x Al 2 O 4 :0.01Li + , x Re 3+ (Re = Eu, Sm, Ho) phosphors are pure monoclinic CaAl 2 O 4 phase. And these phosphors can be effectively excited by the characteristic excitation wavelength of the corresponding rare earth ions. Notably, when the doping concentration is less than 15 mol%, the corresponding luminous intensity increases monotonically with the increase of Ho 3+ , while the optimal doping amounts for Eu 3+ and Sm 3+ are 9 mol% and 1 mol%, respectively. Additionally, comparative analysis revealed superior energy transfer efficiency from the matrix to the luminescent center in the CaAl 2 O 4 :0.01Li + , Eu 3+ relative to Sm 3+ and Ho 3+ counterparts. More importantly, the Ca 0.91 Al 2 O 4 :0.01Li + , 0.09Eu 3+ phosphors also exhibit excellent thermal and ageing stability. Its luminous intensity exhibited minimal deviation (< 16%) across an extended temperature range (208 ~ 448 K). Furthermore, after 320 h of thermal aging at 100 °C, the sample retained over 98% of its initial fluorescence intensity. This study provides theoretical and experimental basis for the development of CaAl 2 O 4 -based phosphors for solid-state lighting devices.
研究领域:
材料科学
·
光电子学
·
固态照明
·
无机化学
·
应用物理学
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 9
·098203
·
IF 1.652
Jieru Xu,Qiuchen Wang,Wenlin Yan,Liquan Chen,Hong Li,Fan Wu
Sulfide solid electrolytes are widely regarded as one of the most promising technical routes to realize all-solid-state batteries (ASSBs) due to their high ionic conductivity and favorable deformability. However, the relatively high price of the crucial starting material, Li2S, results in high costs of sulfide solid electrolytes, limiting their practical application in ASSBs. To solve this problem, we develop a new synthesis route of Li2S via liquid-phase synthesis method, employing lithium and biphenyl in 1, 2-dimethoxyethane (DME) ether solvent to form a lithium solution as the lithium precursor. Because of the comparatively strong reducibility of the lithium solution, its reaction with sulfur proceeds effectively even at room temperature. This new synthesis route of Li2S starts with cheap precursors of lithium, sulfur, biphenyl and DME solvent, and the only remaining byproduct (DME solution of biphenyl) after the collection of Li2S product can be recycled and reused. Besides, the reaction can proceed effectively at room temperature with mild condition, reducing energy cost to a great extent. The as-synthesized Li2S owns uniform and extremely small particle size, proved to be feasible in synthesizing sulfide solid electrolytes (such as the solid-state synthesis of Li6PS5Cl). Spontaneously, this lithium solution can be directly employed in the synthesis of Li3PS4 solid electrolytes via liquid-phase synthesis method, in which the centrifugation and heat treatment processes of Li2S are not necessary, providing simplified production process. The as-synthesized Li3PS4 exhibits typical Li+ conductivity of 1.85×10−4 S⋅cm−1 at 30 °C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 25
·14534-14544
·
IF 12.732
Fei Shen,Zhongti Sun,Liang Zhao,Yuanhua Xia,Yanyan Shao,Jingsheng Cai,Shuo Li,Chen Lu,Xiaoling Tong,Yu Zhao,Jingyu Sun,Yuanlong Shao
Developing high energy density and high-power density electrode materials is of great importance for lithium-ion batteries to satisfy the requirements of the customer market. We report that introducing Mo into Nb2O5 at a low temperature leads to phase transition from bronze-phase T to crystallographic shear-phase H. The resulting Nb1Mo0.1O2.8 exhibits higher energy density than T-Nb2O5 and improved rate-performance and cycling-stability compared to H-Nb2O5. Neutron diffraction was applied to Nb1Mo0.1O2.8 to characterize the structure and two-phase ratios of the mixed metal oxide together with the first-principles method to calculate the possible Mo substitution sites. The Nb1Mo0.1O2.8 anode displays intrinsic pseudocapacitive lithium-ion intercalation with a high energy density of 362 mA h g−1 at 0.2C. In situ XRD results suggest that Nb1Mo0.1O2.8 is able to intercalate more lithium ions with smaller structure expansion compared with H-Nb2O5; furthermore, a computational method reveals that the introduction of Mo into the oxide increases Li atom adsorption energies and decreases the diffusion barrier. Therefore, Nb1Mo0.1O2.8 is a promising anode material for high-capacity and high-rate lithium-ion energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·886
·
IF 5.719
Qianwen Jin,Yajing Yan,Chenchen Hu,Yongguang Zhang,Xi Wang,Chunyong Liang
The advantages of high energy density and low cost make lithium–sulfur batteries one of the most promising candidates for next-generation energy storage systems. However, the electrical insulativity of sulfur and the serious shuttle effect of lithium polysulfides (LiPSs) still impedes its further development. In this regard, a uniform hollow mesoporous Ni(OH)2@CNT microsphere was developed to address these issues. The SEM images show the Ni(OH)2delivers an average size of about 5 μm, which is composed of nanosheets. The designed Ni(OH)2@CNT contains transition metal cations and interlayer anions, featuring the unique 3D spheroidal flower structure, decent porosity, and large surface area, which is highly conducive to conversion systems and electrochemical energy storage. As a result, the as-fabricated Li-S battery delivers the reversible capacity of 652 mAh g−1after 400 cycles, demonstrating excellent capacity retention with a low average capacity loss of only 0.081% per cycle at 1 C. This work has shown that the Ni(OH)2@CNT sulfur host prepared by hydrothermal embraces delivers strong physical absorption as well as chemical affinity.Keywords:Li-S battery;carbon nanotube;nickel hydroxide;cathode
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zhuo Chen,Qiming Wang,Shuai Bai,Xi Wang,Wenlie Lin,Yining Zhang
Pseudocapacitive material can achieve rapid charge and discharge response. In this study, a vanadium-based conductive network hydrate (Na 0.13 Mg 0.02 )V 2 O 5 ·0.98H 2 O (NMVO) was designed. The Na + and Mg 2+ in NMVO are sandwiched between two layers of vacancy-ordered prisms and monoclinic nanonetwork V 3 O 7 (VO 2 :V 2 O 5 = 1:1) to form a conductive network with a layer spacing of up to 11.67 Å, this structure facilitates rapid interlayer diffusion of cations and enhanced conductivity. Reduction-NMVO (r-NMVO) with hierarchical heterostructures was prepared via an in-situ electrochemical process to generate interlayer vanadium-based active sites (LiV 3 O 8 , LiV 2 O 5 , Na 3 V 3 O 8 , MgVO 3 ) with multi-electron reaction, which enhanced the generation of surface redox pseudocapacitance. The interlayer heterostructure is integrated with the core of the precursor V 3 O 7 to form an active site-rich conductive network with strong pulse impact resistance, which promotes the generation of intercalated pseudocapacitance and increases the cycle stability of the electrode. This intercalation-surface redox pseudocapacitive mechanism was confirmed by first-principles, in-situ, and ex-situ characterization analysis. The r-NMVO|Li battery still maintains a capacity of 95.5 % after 65,500 cycles at a current density of 50 A g −1 . These results contribute directly to the realization of stable, fast charge and discharge material design.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiaoping Fan,Youguo Huang,Hongqiang Wang,Fenghua Zheng,Chunlei Tan,Yu Li,Xifei Lu,Zhaoling Ma,Qingyu Li
Defect engineering has been an efficient means to govern the electrocatalytic performances of oxygen electrode in Li-O 2 batteries. Herein, we introduce N atoms into MoS 2 for manufacturing sulfur vacancies to improve the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) kinetics of rechargeable Li-O 2 batteries. The obtained results show that N doping opened the crystal distance space of N-MoS 2 , reduced the charge transfer resistance and simultaneously induces Mo-N bonds and a large number of sulfur vacancies. The assembled Li-O 2 batteries with N-MoS 2 as the cathode electrocatalyst deliver discharge specific capacity of 5205.5 mAh g −1 at the current density of 100 mA g −1 , which is much higher than the MoS 2 (2600.3 mAh g −1 ). It also shows excellent cyclic performance with 224 cycles at the current density of 200 mA g −1 within a capacity limitation of 1000 mAh g −1 . Overall, the as-developed N-MoS 2 could be regarded as a promising cathode electrocatalyst for Li-O 2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Xianyu Liu,Tayyaba Najam,Ghulam Yasin,Mohan Kumar,Miao Wang
Tin chalcogenides are considered as promising anode materials for lithium-ion batteries (LIBs) due to their high theoretical lithium-storage capacity. Herein, we have successfully synthesized the composites of tin chalcogenides and graphite, that is, SnS/C, SnSe/C, and SnS0.5Se0.5/C, via a simple one-pot solid-state method. During the electrochemical test, they exhibit excellent lithium-storage ability and cyclic performance as the anode electrodes of LIBs due to the introduction of carbon. In particular, (i) SnS/C displayed a high specific capacity of 875 mAh g–1 at 0.2 A g–1 over 200 cycles; (ii) SnSe/C presents 734 mAh g–1 at 0.2 A g–1 after 100 cycles, and it delivers 690 mAh g–1 at 1.0 A g–1 over 300 cycles; and (iii) the SnS0.5Se0.5/C composite electrode delivers a specific capacity of 643 mAh g–1 at 0.5 A g–1 over 150 cycles. Furthermore, another series of tin-based composites have also been successfully fabricated (i.e., Sn/C, SnS2/C, SnSe2/C, and SnTe/C), showing the general applicability of the synthetic route applied here. Our synthetic approach demonstrates a promising route for the large-scale production of high-performance tin chalcogenides/C anode materials for LIBs and other battery systems (e.g., Na-ion and K-ion batteries).
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 12
·5681-5688
·
IF 2.289
Wang Li-Zhen,Yang Wei,Lv Teng-Fei,Gao Ke-Zheng,Yan Ji
In this paper, core-shell like LiAlO 2 -coated Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 composite was synthesized by an improved solvothermal method. The surface of the material becomes rough after LiAlO 2 coating with a thickness of 5–10 nm. Meanwhile, the surface-coating component with the layer structure α-LiAlO 2 can change the dispersion of transition metal elements. When tested in 2.0–4.8 V at 0.05 °C, the initial discharge capacity of the LiAlO 2 -coated sample is 206.4 mAh g −1 with the columbic efficiency of 78.0%, which is higher than that of the pristine Li-rich Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 sample. Further tested under 1 C rate, the coated sample possesses 151.4 mAh g −1 of specific capacity and maintains 149.0 mAh g −1 after 50 cycles with the capacity retention of 98.4%. The improved reversible capacity, rate capability, and cycling durability of the Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 material are attributed to the synergistic effect of surface coating of highly Li-conductive LiAlO 2 and the fuzzy interface between LiAlO 2 and Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 .
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）