JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Xianzhun Huang,Haojie Liu,Wenyi Xiang,Lihan Chen,Xinran Li,Bangzhuang Xue,Jian Ma,Yueyue Wu,Chengwei Wang,Yinhua Bao,Weiwei Ping
Oxide-based electrolytes are promising with high ion conductivity and a wide electrochemical window (0–5 V). However, the brittleness and poor compressibility severely inhibit their application. Here, inspired by the “flexible eggshell membrane”, we fabricated a 20 µm, flexible and compressible Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 thin film by in-situ healing the LLZTO crystal chips with poly(di(ethylene glycol) ethyl ether acrylate) electrolytes. Fracture mechanics analysis demonstrates the superior mechanical properties of the flexible LLZTO films. With the package pressure increasing from 0.6 to 1.4 t, the Li metal symmetric cell displays a decreasing internal resistance from ∼281 to ∼156 Ω cm 2 , corresponding to the low limit of ion conductivity from ∼0.6 × 10 −4 to ∼2.1 × 10 −4 S/cm. The symmetric cell can be a stable cycle for ∼220 h at 0.4 mA/cm 2 and ∼300 h at 0.1 mA/cm 2 with a bending angle of 30°. The full cell LiFePO 4 /LLZTO/Li shows a superior rate performance of 150 mA/g and a long cycle life of ∼200 cycles. Pairing with the LiNi 0.8 Co 0.1 Mn 0.1 O 2 , the cell displays a Coulombic efficiency of ∼99.7 % for ∼150 cycles. These results indicate that we have successfully fabricated flexible and compressible LLZTO films, and this will open an avenue for the application of high-energy-density thin film batteries.
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高影响因子
Journal of Sustainable Metallurgy
·
2021
·Vol. 7
·期 1
·203-214
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IF 2.347
Tang Zujian,Guan Xiaofei
Abstract Lithium is a critical metal with a wide range of applications in energy, electronics, and chemical industry. Currently, the industrial method for Li metal extraction relies on electrolysis of molten LiCl and suffers from various safety, cost, and environmental issues. In this work, we report electrochemical extraction of Li from molten LiOH by using a liquid tin (Sn) cathode. The use of liquid Sn cathode offers various advantages, such as lowering the dissociation potential of LiOH and easy collection of the metallic Li. Electrochemical and materials characterization results reveal that a plunge of electrolysis current occurs in the electrolyser without using a porous alumina membrane, due to the formation of a Li 2 O passivation layer at the cathode/electrolyte interface. In the electrolyser with a porous alumina membrane, continuous electrolysis has been achieved, and the side surface of the liquid Sn is identified to be the effective interface for Li electrodeposition. In addition, we demonstrate the use of the Li–Sn product for the synthesis of acetylene (C 2 H 2 ), a widely used fuel and chemical feedstock. Graphical Abstract
研究领域:
材料科学
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电化学
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能源技术
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化学工程
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DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tian Qin,Zihao Wang,Xiaojun Ding,Shuqi Fu,Na Zhan,Wentao Lu,Zijian Li,Zihao Huang,Mingyang Li,Jiansheng Liu,Fei Gao,Weiping Zhou,Zhenzhi Cheng,Guangsheng Luo
Li 7 P 3 S 11 -based all-solid-state lithium metal batteries (ASSLMBs) have received a lot of attention because of their potential for high energy density . However, the poor interfacial stability between Li 7 P 3 S 11 electrolyte and lithium metal anode hinders its application in ASSLMBs. Here, the Li-SnO 2 composite anode (LSO) was designed by treating the lithium metal with SnO 2 to produce an interface composed of Li 22 Sn 5 and Li 2 O phases. The rapid lithium ion diffusion coefficient of Li 22 Sn 5 alloy accelerates the migration of lithium ions at the interface, while the favorable lithiophilicity of Li 2 O induces the uniform deposition of lithium ions, which hinders the growth of lithium dendrites . Therefore, the symmetrical battery using an LSO anode showed a high critical current density (CCD) of 2.5 mA cm −2 at room temperature and a stable cycle of 350 h at room temperature at 0.2 mA cm −2 (0.2 mAh cm −2 ). In addition, the improved all-solid-state lithium battery also showed an ultra-stable cycle, and the NCM622/LPS/10LSO battery still maintained 78.6 % of its original capacity after 250 cycles at 0.5C. The surface treatment method of the LSO composite anode enables it to produce ASSLMB with excellent electrochemical performance .
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2023
·Vol. 36
·期 2
·231-231
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IF 1
Liu Xu-hao,Liu Yang-yang,Zhu Rong-zhi,Liu Lu-jie,Xu Chen-xin,Cao Hui
Metal-halide perovskite solar cells (PSCs) have attracted considerable attention during the past decade. However, due to the existence of non-radiative recombination losses, the best power conversion efficiency (PCE) is still lower than the theoretical limit defined by Shockley-Queser theory. In this work, we investigate 1,2,3-oxathiazin-4(3h)-one, 6-methyl-2,2-dioxide (acesulfame potassium, abbreviated as AK) as a additional dopant for the 2,2′,7,7′-tetrakis( N , N -di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (Spiro-OMeTAD) and fabricate PSCs in the air. It is found that 12 mol% fraction of AK relative to lithium bis((trifluoromethyl)sulfonyl)-amide (Li-TFSI) reduces the non-radiative recombination from 86.05% to 69.23%, resulting in an average 0.08 V of V oc enhancement. The champion solar cell gives a perovskite solar cells up to 21.9% and over 84% retention of the initial value during 720 h aging in dry air with 20%–30% humidity.
研究领域:
材料科学
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可再生能源
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光伏技术
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DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuanbo Han,Yuanchuan Li,Yuqin Huang,De Li,Yu Wu,Wenting Ji,Yong Chen
As a well-known two-phase material, spinel Li4Ti5O12 has been widely studied and commercially applied in lithium-ion batteries, and its zero-strain phase transition derives some unique electrochemical phenomena such as memory effect and electrochemical oscillation. Due to the same spinel structure and redox element, the spinel LiCrTiO4 presents similar electrochemical properties including memory effect and electrochemical oscillation. However, electrochemical oscillation has not yet been observed during the discharge process of LiCrTiO4. In this study, spinel LiCrTiO4 was prepared by spray-drying in a vertical tube furnace and then sintered at a high temperature, which exhibits electrochemical oscillation during both charging and discharging. According to XPS, TEM, NMR, and in-situ XRD results, the nonstoichiometric Li1–xCr1–yTiO4 (x, y = 0.2, 0.1, and 0) samples possess a good spinel structure with partial Li ions at 16d sites and take a reversible two-phase transition between the spinel and rock-salt structures. In addition, a schematic diagram is proposed to interpret the electrochemical oscillation of LiCrTiO4, in which the nucleation and phase transition processes play the rate-determining step alternatively. Therefore, it is the first time the electrochemical oscillation is achieved during both charge and discharge of LiCrTiO4, and an alternative rate-determining step is proposed to elucidate the electrochemical oscillation, which offers an original perspective for understanding two-phase reactions and their derivative phenomena in lithium-ion batteries.
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Yang Tingting,Yang Maolin,Huang Zhongyuan,Wang Rui,Ji Wenhai,Lu Peng-Han,Zeng Tao,Li Zenan,Wang Jun,Dunin-Borkowski Rafal E.,Jin Lei,Xiao Yinguo
Layered Li-rich Mn-based (LRM) oxides are promising cathode materials for next-generation high-energy batteries. However, their commercialization is hindered by intrinsic structural issues and subsequent degradation processes. In order to address the degradation mechanisms, we use operando neutron diffraction and scanning transmission electron microscopy to follow the microstructural degeneration of the LRM oxides in a prepared full cell with a graphite anode. The methods enable both real-time phase analysis and structural evolution mapping across a wide field of view. The LRM oxide is observed to initially have a partially ordered Li 2 MnO 3 -like structure with multiple planar defects. It transitions from an ordered monoclinic phase to a disordered rhombohedral phase as a result of irreversible Li + migration and transition metal rearrangement during cycling. Especially after the first full charge, the interlayer (001) twining-like structures and local intralayer frustrations formed. Over cycling, the intralayer frustrations further develop into pore-like microstructures along the {012} twinning boundary in the bulk of the particles, which contributes significantly to performance reduction. The results clarify the link between microstructure degradation and performance loss and provide valuable insights into the optimization of high-performance cathodes.
研究领域:
材料科学
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电化学
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储能
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电池技术
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固态化学
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产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
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2022
·Vol. 77
·期 7
·715-722
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IF 1.712
Jinghao Zhuang,Wenlin Feng,Bo Zhou,Qili Zhang,Chong Liu,Yao Gong
A series of CaSr(WO 4 ) 2 : Eu 3+ and CaSr(WO 4 ) 2 : Eu 3+ , Li + phosphors with different Eu 3+ or Eu 3+ /Li + molar contents were successfully synthesized by high-temperature solid-state reaction. Through a series of characterization methods, the composition, structure and luminescence characteristics of the sample are obtained. Upon excitation at 393 nm, the strong red light corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ can be observed. The effect of Li + charge compensation on the photoluminescence of the sample is studied. The strongest red emission is obtained through 1% Eu 3+ and 1% Li + doping. All of the results indicate that Li + charge compensation can effectively enhance the red emissions intensity of Eu 3+ -doped CaSr(WO 4 ) 2 phosphors.
研究领域:
材料科学
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光学
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DOI
高影响因子
Journal of Energy Chemistry
·
2019
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IF 5.162
Xi Zheng,Ying Liao,Zhongru Zhang,Jianping Zhu,Fucheng Ren,Huajin He,Yuxuan Xiang,Yezhen Zheng,Y. Yang
Ethyl-(2,2,2-trifluoroethyl) carbonate (ETFEC) is investigated as a solvent component in high-voltage electrolytes for LiNi 0.5 Mn 1.5 O 4 (LNMO). Our results show that the self-discharge behavior and the high temperature cycle performance can be significantly improved by the addition of 10% ETFEC into the normal carbonate electrolytes, e.g., the capacity retention improved from 65.3% to 77.1% after 200 cycles at 60 °C. The main reason can be ascribed to the high stability of ETFEC which prevents large oxidation of the electrolyte on the cathode surface . In addition, we also explore the feasibility of electrolytes using single fluoriated-solvents with and without additives. Our results show that the cycle performance of LNMO material can be greatly improved in 1 M LiPF 6 + pure ETFEC-solvent system with 2 wt% ethylene carbonate (EC) or ethylene sulfate (DTD). The capacity retention of the LNMO materials is 93% after 300 cycles, even better than that of carbonate-based electrolytes. It is shown that the additives are oxidized on the surface of LNMO particles and contribute to the formation of cathode/electrolyte interphase (CEI) films. This composite CEI film plays a crucial role in suppressing the serious decomposition of the electrolyte at high voltage.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Shuting Li,Manting Li,Limin Chen,Jianying Yang,Zhao Wang,Fan Yang,Linhong He,Xinchun Li
Artificial nanochannels have seen great progress in energy storage, molecular filters, nanofluidic diodes, and biosensors. Precisely recognizing and transporting molecules or ions underpin the basis of artificial nanochannels. Here, we report highly efficient Li + responsive nanochannels by design of functionalized porous anodic aluminum oxide (AAO) membranes. The 12-crown-4 unit was tethered to the synthesized spiropyran molecule, creating a smart Li + responsive element, photochromic crowned spiropyran (CE-SP). The crown unit can specifically bind with Li + while exempting the harassment of other metallic cations; and importantly, the spiropyran moiety possesses reversible photochemistry response, adding the flexibility to regulate ion transport behaviors. Upon the ultraviolet light stimulus, hydrophobic CE-SP molecules transform to positively charged crowned merocyanine (CE-MC), which can further convert to oxygen-negative ions in weak alkaline environment, thereby forming O - -Li + interaction. Such structural evolutions enable to deftly tune the surface charge and wettability of the nanochannels, and thus ingeniously manipulate Li + recognition profiled by ionic current signal. Moreover, electrically-driven release of the captured Li + can be realized in an amiable condition, showing controllable capture-to-release ability. Finite element simulation unveils the fundamental mechanisms of ion transport pertaining to Li + recognition events in the nanoconfinement. This work thus paves a way to construct high-performance Li + -selective nanodevice, and holds promise for Li + -related electrochemistry energy research.
研究领域:
材料科学
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纳米技术
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电化学
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DOI
PubMed
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 30
·13065-13071
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IF 7.79
Kun Wang,Yongyuan Hu,Jian Pei,Fengyang Jing,Zhongzheng Qin,Huabin Kong,Jinli Wang,Yumin Zhou,Gang Chen
High-capacity Co2VO4 has become a potential anode material for lithium-ion batteries (LIBs), benefiting from its lower output voltage during cycling than other cobalt vanadates. However, the application of this new conversion-type electrode is still hampered by its inherent large volume variation and poor kinetics. Here, a 2D–2D heterostructure building strategy has been developed to enhance the electrode performance of Co2VO4 through construction of Co/Co2VO4 nanocomposites converted from the in situ phase separation of Co2V2O7·3.3H2O nanosheets. Co/Co2VO4 based on face-to-face contact exhibits the optimized stacking configuration, where Co nanocrystals give gaps of several nanometers between stacked Co2VO4 nanosheets, enabling full contact with the electrolyte, a shorter transport path of lithium ions and more reactive sites. With this design, Co/Co2VO4 anodes deliver outstanding reversible capacity (750 mA h g−1 at 1 A g−1) with ultrahigh capacity retention rate, and excellent cycle stability at high rate (520 mA h g−1 at 5 A g−1 retained after 400 cycles). An “active center's charge transfer—capacity compensation” model was proposed based on capacity analysis, XPS depth analysis and HRTEM observation to uncover the fundamental reason of the excellent cycle performance. This in situ 2D–2D heterostructure constructing strategy may open up the possibility for designing high-performance LIBs.
研究领域:
材料科学
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能源存储
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DOI
PubMed
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 21
·e202201473
·
IF 9.14
Rundong Fan,Yizeng Wu,Haipeng Xie,Yongli Gao,Lina Wang,Bo Zhao,Dong Li,Shaocheng Liu,Yu Zhang,Hua Kong,Yujing Li,Qi Chen,Anyuan Cao,Huanping Zhou
Graphical Hybrid theory : A hybrid perovskite material, 4,4’-ethylenedipyridinium lead bromide, is assembled onto carbon material to function as photoelectrode of the Li-oxygen battery, leading to a reduced overpotential of 0.5 V compared to the Li-oxygen battery without illumination (1.3 V). The overpotential can be maintained lower than 0.9 V after cycling for 170 h. Organic-inorganic hybrid perovskites have emerged in the last decade as promising semiconductors due to the excellent optoelectronic properties. This kind of perovskites exhibited respectable photocatalytic activities toward potential application in battery; however, the instability issue still hindered their practical use. Herein, a hybrid perovskite material, 4,4’-ethylenedipyridinium lead bromide [(4,4’-EDP)Pb 2 Br 6 ], was assembled onto the carbon materials to function as photoelectrode of the Li-oxygen battery. The strong cation-π interactions between the A-site cations enabled this hybrid perovskite to endure the cycling process as well as the exposure to battery electrolyte and oxygen. Benefitting from the photo-generated carriers of the photoelectrode under illumination, the formation/decomposition of the discharge product was accelerated, thus leading to a reduced overpotential from 1.3 V to an optimized 0.5 V compared to the Li-oxygen battery without illumination. The overpotential could be maintained lower than 0.9 V after cycling for 170 h. Furthermore, when exposed to the sunlight, the charging voltage was reduced by over 0.2 V. The intrinsic stability and strong light absorption of perovskites together with the optimized perovskite/carbon cathode interfaces contributed to the improved performance under different light sources without complex material design, which shed light on the exploration of organic-inorganic hybrid perovskites in Li-oxygen battery applications.
研究领域:
能源存储
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材料科学
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光化学
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电化学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9354-9363
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IF 12.732
Zheng Si,Baozhao Shi,Jin Huang,Ye Yu,You Han,Jinli Zhang,Wei Li
Nickel-rich layered oxides (LiNixCoyMn1−x−yO2) (x ≥ 0.8, NCM) are intensively developed cathode materials for lithium-ion batteries owing to their high energy and low price, however, their application is impeded by poor cycle stability. Herein we explored a Ti and F co-doped Li(Ni0.8Co0.1Mn0.1)O2 cathode through a solid phase reaction using the precursors of TiO2 and NH4F. Combining the characterization results of XRD, Ar sputtering assisted XPS, HRTEM, in situ XRD, etc, it is illustrated that Ti4+ and F− co-modification can synergistically modulate the lattice parameter and the Ni2+/Li+ mixing degree for the Li(Ni0.8Co0.1Mn0.1)O2 cathode material. Particularly, density functional theory (DFT) calculations demonstrate that Ti and F co-doping is beneficial to form stable crystal structures with a layered phase and rock-salt phase. Ti4+ and F− co-dopants induce the formation of an ultra-thin rock-salt phase on the cathode surface, which provides a protective layer on the nickel-rich cathode surface, so as to enhance the electrochemical performance. The optimal Ti4+ and F− co-doped sample 0.5Ti@0.5F-NCM shows a superior discharge capacity of 202.2 mA h g−1 at 1C and 45 °C, and a capacity retention of 88.1% after 200 cycles, much higher than the retention of 45.2% for NCM. For 0.5Ti@0.5F-NCM, the lithium-ion diffusion coefficients after the 1st and 100th cycles are 2.67 × 10−11 cm2 s−1 and 7.14 × 10−12 cm2 s−1 respectively, larger than those of the pristine NCM (1.37 × 10−11 cm2 s−1 and 4.52 × 10−12 cm2 s−1). The Ti4+ and F− co-doping can suppress the H2–H3 phase change of the cathode during the charge and discharge process and reduce the charge transfer resistance. The results provide a simple and feasible design strategy via cation@anion dopants to boost the electrochemical performance of nickel-rich cathodes for lithium-ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
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