Nature Energy
·
2018
·Vol. 3
·期 8
·674-681
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IF 46.859
Zeng Ziqi,Murugesan Vijayakumar,Han Kee Sung,Jiang Xiaoyu,Cao Yuliang,Xiao Lifen,Ai Xinping,Yang Hanxi,Zhang Ji-Guang,Sushko Maria L.,Liu Jun
Non-flammable electrolytes could intrinsically eliminate fire hazards and improve battery safety, but their compatibility with electrode materials, especially graphite anodes, remains an obstacle owing to the strong catalytic activity of the anode surfaces. Here, we report an approach that improves the stability of non-flammable phosphate electrolytes by adjusting the molar ratio of Li salt to solvent. At a high Li salt-to-solvent molar ratio (~1:2), the phosphate solvent molecules are mostly coordinated with the Li + cations, and the undesired reactivity of the solvent molecules toward the graphite anode can be effectively suppressed. High cycling Coulombic efficiency (99.7%), good cycle life and safe operation of commercial 18650 Li-ion cells with these electrolytes are demonstrated. In addition, these non-flammable electrolytes show reduced reactivity toward Li-metal electrodes. Non-dendritic Li-metal plating and stripping in Li–Cu half-cells are demonstrated with high Coulombic efficiency (>99%) and good stability.
研究领域:
材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Tiancun Liu,Jiulin Hu,Chilin Li,Yong Wang
Li metal anode is deemed the most promising candidate anode for high-energy battery systems such as Li-sulfur and Li-fluoride batteries. However, some severe challenges, for example, facile formation and growth of Li dendrites, large volume evolution of hostless Li ,and low Coulombic efficiency of Li plating/stripping, still hinder the commercialization of Li-metal batteries (LMBs). Herein, a free-standing and highly flexible 3D current collector made of carbon nanofibers (CNFs) conformally coated by continuous Sn layer is synthesized by electrospinning method. Sn layer enables a lithiophilic and alloyable carbon skeleton surface and provides uniform and continuous Li nucleation sites, leading to unusual conformal Li plating behavior and effective inhibition of Li dendrites. The spatial confinement of Li plating mitigates the volume expansion and network distortion of CNFs. The electric contact reinforced by Sn interlayer achieves highly reversible Li stripping for more than 850 h for CNF-Sn@Li symmetric cell. The small nucleation overpotential (28 mV) and potential polarization (14 mV for symmetric cell) benefit from the low energy barrier of Li–Sn alloying and following Li nucleation on Li–Sn layer. For CNF-Sn@Li-LiFePO4 full cell, the capacity retention ratio is as high as 92.2% after 150 cycles at 0. 5C and the reversible capacities are maintained at 134.3 and 106.7 mAh g–1 at 2C and 5C respectively. The design of 3D lithiophilic current collector instead of planar Cu is a potential solution to highly safe LMBs.
研究领域:
材料科学
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能源存储
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产品关联
DOI
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Lei Fu,Chao Zou,Yun Huang,Xinyan Xiang,Jie Xiao,Wenping Zeng,Xing Li,Mingshan Wang,Bingshu Guo,Yuanhua Lin
Multifunctional modified separators have the potential to effectively regulate Li ion deposition, suppress the growth of dendrite and improve the safety of lithium metal batteries (LMBs). Here, we designed a separator, constructed by co-deposition of polydopamine (PDA) and polyethyleneimine (PEI) on PP separator. Due to the introduction of polar functional groups such as amine groups, PDA/PEI-3 modified separator exhibits better electrolyte wettability, higher Li ion migration number (0.9), lower energy barrier and faster ion transfer kinetics. Electrochemical tests prove that PDA/PEI-3 modified separator has achieved better cycling stability at different current density in Li//Li symmetric cells and higher CE in Li//Cu cells. Meanwhile, the Li/LFP full cells show more excellent rate performance and long cycle performance (80%). SEM and XPS also prove that modified separator has achieved homogenized Li ions flux and more uniform LiF-rich SEI layer. This work provides a simple and effective strategy for functional separator to protect Li metal anode and improve safety performance of LMBs.
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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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 37
·20174-20186
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IF 11.9
Guoqiang Zhao,Changwei Luo,Qingsong Hua
Battery systems based on garnet-type solid electrolytes and Li metal anodes coupled with high-specific-capacity cathodes are expected to be the most promising high-energy density solid-state lithium-ion batteries. However, the low critical current density of garnet-type solid electrolytes and their high interface resistance have been the main challenges facing these materials in the application of solid-state batteries. Herein, a low-melting-point metal chloride coating combined with in situ lithiation addresses the key issues of interface contact and growth of Li dendrites. BiCl3 with fluid properties can serve as an “aqueous” interlayer, in situ constructing a 3D cross-linked Li+ selective transport network for Li+ transfer (BiLi3) and electron blockage (LiCl) via thermal lithiation. Consequently, Li/Li symmetric cells can charge/discharge dendrite-free at a high current density of 10.0 mA cm−2 and stably cycle at 2.5 mA cm−2 for over 1000 h at room temperature. The Li metal full cells with coated garnet solid electrolyte and LiFePO4 cathode exhibit a 105.5 mA h g−1 residual capacity at a rate of 4C and 138.8 mA h g−1 reversible capacity at 1C after 600 cycles. This innovative modification strategy laid the groundwork for future commercial applications of garnet-type solid electrolytes.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xiyuan Tao,Li Yang,Jiali Liu,Zihao Zang,Peng Zeng,Changfei Zou,Lingguang Yi,Xiaoyi Chen,Xiaolin Liu,Xianyou Wang
Garnet-type Li 7 La 3 Zr 2 O 12 (LLZO) is a promising solid-state electrolyte (SSE) for next generation lithium batteries due to its high Li + conductivity and stability against lithium metal, especially the Li 7−3x Ga x La 3 Zr 2 O 12 (Ga-LLZO) is most valuable because of its high ionic conductivity (> 1 ×10 −3 S cm −1 ). However, it is difficult to prepare high-quality Ga-LLZO by the traditional air ambient sintering. Herein, we develop a simple and efficient rapid ultra-high-temperature sintering (RUHTS) method to prepare high-conductivity Ga-LLZO ceramic SSE. It has been found that the as-prepared Ga-LLZO ceramic SSE with the composition of Li 6.25 Ga 0.25 La 3 Zr 2 O 12 exhibits high relative density of 99%, good ionic conductivity of 1.48 × 10 −3 S cm −1 and large critical current density of 0.5 mA cm −2 after sintering at 1200 °C for 2 min. In addition, the Ga-LLZO SSE shows good electrochemical stability and interfacial compatibility against Li metal. The assembled Li-Li symmetric cell represents a small interfacial impedance of 37 Ω cm 2 . In the same time, the Li/Ga-LLZO/LE+LMNCO full battery has a total impedance of 205 Ω cm 2 , and can deliver a first discharge capacity of 235.1 mAh g −1 at 0.5 C, and the capacity retention rate is 88.3% after 100 cycles. This indicates that the as-prepared Ga-LLZO has good application prospect in the Li-metal solid-state batteries (LMSSBs). Moreover, this method does not require the use of mother powder during preparation process, which will effectively reduce the waste of raw materials, save manufacture costs and be beneficial to quantity production of Ga-LLZO ceramic electrolyte.
研究领域:
材料科学
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电化学
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电池技术
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 19
·12214-12224
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IF 10.733
Yuanzhou Yao,Xiaohui Zhao,Amir Abdul Razzaq,Yuting Gu,Xietao Yuan,Rahim Shah,Yuebin Lian,Jinxuan Lei,Qiaoqiao Mu,Yong Ma,Yang Peng,Zhao Deng,Zhongfan Liu
The passivation of lithium metal anodes to mitigate an unstable solid electrolyte interface and parasitic dendrite growth is the key premise for their successful implementation in lithium metal batteries. Herein, aiming to simultaneously reduce the interfacial resistance and to suppress lithium dendrites, we coated lithium metal anodes with two-dimensional (2D) rGO layers prepared via a solvent-evaporation-assisted self-assembly. Upon lithiation/delithiation, the rGO coating cracked into mosaic-like flakes, in between which the interconnected gaps served as the passage for uniform lithium plating/stripping. Half cells composed of a sandwich Cu/Li/rGO electrode vs. Cu foils revealed much improved Li usage and coulombic efficiencies. Through ex situ SEM imaging and XPS depth profiling, a comprehensive view of Li intercalation, deposition, and dendrite suppression on the rGO coating was obtained. As a result of the improved kinetics of Li transportation, excellent electrochemical performances were demonstrated in symmetric gLi‖gLi cells with a stabilized overpotential of only 87.9 mV at 5 mA cm−2 over 600 cycles, and in Li–S batteries with a stabilized capacity of 1200 mA h g−1 at 1C near 1000 cycles.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
POLYHEDRON
·
2025
·
IF 2.6
Haoyun Lu,Kun Zhang,Liping Gao
The high-efficient detection of specific inorganic ions in H 2 O is extremely important, and monitoring S 2− and Ag + is of great significance because their abnormal levels will lead to many environmental and health problems. Herein we propose a long-wavelength absorbing carbocyanine dye DIDS-Li as a colorimetric probe to detect S 2− and Ag + based on color changes induced by structural changes of DIDS-Li. Sensing results suggest that the S 2− will cause the azure DIDS-Li to become colorless and the Ag + causes DIDS-Li to become bright yellow. This colorimetric probe also shows the good immunity to interference, a wide linear response range, and quantitative accuracy of S 2− and Ag + detections in natural water samples. Meanwhile, we also develop a smartphone analysis method that greatly improves the real-time detection ability of DIDS-Li for S 2− and Ag + . This work elucidates the relationship between carbocyanine dye and inorganic ions which offers a new means for efficient detection of S 2− and Ag + and the new idea for the application of carbocyanine dyes in colorimetric detection.
研究领域:
分析化学
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环境监测
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无机离子检测
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 67
·39037-39045
·
IF 3.049
Xin Min
In this study, novel hydroxyl-terminated polybutadiene (HTPB) with a high cis-1,4 content was developed using a tert-butyl dimethyl siloxy dimethyl propyl lithium (Li)–naphthenate nickel (Ni)–boron trifluoride (B) initiating system (Li–Ni–B). The effects of the material ratio and the addition sequence on the cis-1,4 content and molecular weight of HTPB were studied, and the results were discussed. The optimal Li/Ni ratio was 10 : 1, and the optimal Li/B ratio was 1 : 2. HTPB prepared by the Li–Ni–B system was characterized by Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H-NMR) spectroscopy, and 13C nuclear magnetic resonance (13C-NMR) spectroscopy. The results suggested high cis-1,4 contents in HTPB synthesized using Li–Ni–B (cis-1,4 > 95%). The comparison of the cis-1,4 contents in the HTPB samples obtained by anionic polymerization and the Li–Ni–B system revealed the advantages of the latter compared to the former.
研究领域:
材料科学
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聚合物化学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Zihui Liu,Wenting Feng,Jianhang Yang,Xinru Wei,Yunbo Zhang,Chenyu Ma,Yiming Sun,Han Wang,Haolin Wu,Debin Kong,Changming Mao
The escalating demand for high-energy-density storage has intensified research on Li-Cl 2 batteries, which exhibit ultrahigh energy density but suffer from rapid failure due to the poor ionic conductivity and mechanical fragility of naturally formed LiCl interphases on Li metal. Here, we design an organic–inorganic hybrid protective layer (Li 3 Sb/LiF/PVDF, denoted as LSLP@Li) via in situ interfacial engineering. This designed layer effectively isolates the Li anode from corrosive SOCl 2 electrolyte and suppresses parasitic reactions. The synergistic Li 3 Sb/LiF phase ensures high ionic conductivity and guides uniform Li deposition, while the flexible PVDF matrix accommodates cycling-induced volumetric strain. As a result, the LSLP@Li anode maintains structural integrity for over 48 h in corrosive electrolyte (<2 h for bare Li), enabling Li-Cl 2 batteries to maintain over 400 cycles at 1000 mA g −1 . The study advances the understanding of naturally formed LiCl layer on SOCl 2 -based battery and provide valuable strategy to achieve the interfacial stability.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yin Xie,Yongcheng Jin,Lan Xiang
The nontoxicity and low cost make LiMn2O4 a competitive cathode material for lithium-ion batteries. LiMn2O4 has a high theoretical capacity (296 mAh g–1) when cycled in the 3 and 4 V regions. However, it displays a low practical capacity (∼120 mAh g–1) because of the unavailability of the 3 V region caused by severe Jahn–Teller distortion. The present work investigated the full utilization of LiMn2O4 in both 3 and 4 V by tuning the nanoscale interfacial properties. Li-rich structures at the surface and interface of the spinel material and nanograin strain were introduced to improve the performances and were achieved by grinding LiMn2O4 and Li2O at 700 rpm for 10 h under an argon atmosphere. The product shows a high initial discharge capacity of 287.9 mAh g–1 at 0.05 C between 1.2 and 4.6 V and retains 83.2% of the capacity after 50 cycles. The nanoscale interfacial structure was clarified by spherical aberration-corrected microscopy and XRD refinement, and complex occupancies of Li and Mn were found at the interface. A correlation between the interfacial properties and electrochemical performance was established, and the improved performance could be attributed to the polycrystalline nature of the material, the unique Li-rich interfacial structure, and the slightly elevated valence state of Mn. The present results may provide insight for further evaluating the complex mechanism of controlling the electrochemical performance of LiMn2O4.
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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锂离子电池
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纳米材料
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Chenyang Jiao,Qizheng Zheng,Kang Zhang,Jiyuan Xue,Na Liu,Baodan Zhang,Yueli Lin,Xuequan Zhu,Changhao Wang,Hong-Gang Liao,Chong-Heng Shen,Yeguo Zou,Yu Qiao,Shi-Gang Sun
High-energy-density Li-rich layered oxide-based Li-metal batteries depend critically on the unique anionic redox. However, severe electrolyte decomposition and interfacial structural degradation hinder the longevity and stability of Li-rich||Li-metal batteries. Here, we show that a rational hybrid electrolyte design strategy can regulate interfacial chemistry through precise manipulation of cathode surface-exposed nucleophilic species. As a proof of concept, ethyl methyl sulfone is employed as the primary solvent due to its oxidative stability and resistance to nucleophilic attack, simultaneously strategically fabricating a fluorinated ether as a cosolvent that directs nucleophilic reaction toward its targeted functionality. Furthermore, this hybrid electrolyte design simultaneously facilitates the formation of a LiF-rich cathode electrolyte interphase (CEI) and reorganizes the solid electrolyte interphase on the Li metal from the preferential decomposition of cosolvents and anions. As a result, ultrahigh Coulombic efficiency (CE) (>99.4%) for Li-rich cathodes and enhanced Li-metal plating/stripping reversibility are achieved. Consequently, the optimized electrolyte demonstrates exceptional cycling stability, retaining 92% capacity over 100 cycles with ultrahigh average CE (>99.3%) under demanding conditions (limited Li supply, N/P = 2). Remarkably, this hybrid electrolyte enabled superior operation with anode-free cell architectures and enabled extreme temperatures (−30 to 55 °C) cycling. By effectively transforming detrimental nucleophilic attack into interfacial enhancement, this work establishes a new paradigm for electrolyte design in utilizing anionic redox chemistry.
研究领域:
电化学
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能源材料
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固态离子学
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电池技术
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界面科学
·
材料化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Wei Wang,Yuqing Chen,Zixing Wang,Meichen Li,Liqiang Ouyang,Peitao Xiao,Jian-Fang Wu,Jilei Liu
Lithium metal batteries (LMBs) using high-voltage nickel-rich layered cathode (LiNi x Co y Mn 1-x-y O 2 , NCM, x≥ 0.9), though delivering high energy density, suffer from critical instability of electrode/electrolyte interphases and structural degradation of NCM cathodes, causing rapid capacity fading. Here, trimethoxyboroxine (TMOBX) is used as a lithium-ion coordination regulator in the commercial carbonate electrolyte to improve the cycling stability of LMBs at high voltage. Owing to the strong polarized B─O bonds, TMOBX not only prefers to interact with Li + because of the high electron density of O, but also attracts more PF 6 − in the solvation structure due to the positively charged B, resulting in robust and ionic conductive electrode/ electrolyte interphases rich in P─F compounds, B─O and B─F species. Moreover, TMOBX effectively eliminates HF in the electrolyte, all of which can avoid lithium dendrites, and suppress corrosion of LiNi 0.9 Co 0.05 Mn 0.05 O 2 (NCM90) and dissolution of transition metal ions. Consequently, the Li/Li symmetrical cells exhibit highly enhanced cycling stability of 500 h at 1 mA cm −2 , and the capacity retention of Li/NCM90 cells increases from 45.7% to 80.5% after 100 cycles at an ultrahigh cut-off voltage of 4.7 V.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）