CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10633-10639
·
IF 3.45
Guorong Hu,Zhichen Xue,Zhongyuan Luo,Zhongdong Peng,Yanbing Cao,Weigang Wang,Yuexi Zeng,Yong Huang,Yong Tao,Tianfan Li,Zhiyong Zhang,Ke Du
The Li-rich cathode material for long cycle performance and long-term storage performance is a challenge for next-generation lithium-ion batteries due to the rapid capacity degradation over cycling and the formation of residual lithium on the surface during long-term storage. Herein, an elevated performance of Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 materials via CeO 2 inlay is reported, which was prepared from Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 by sol-gel inlay with CeO 2 . It was proved by scanning electron microscopy, high-resolution transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy that cerium oxide cladding not only covered the surface of the material but also diffused into the interior of the material change crystal structure. Cerium oxide on the cladding not only reduces the material's contact with water and carbon dioxide in the air, but also prevents the material from being corroded by electrolyte during electrochemical test. The position of the transition metal atom is replaced Ce atoms, which increases the unit cell volume and the stability of the Li-rich material during the cycling. The results show that the storage property and the electrochemical cycling property of the material have been improved obviously. The CeO 2 inlaid lithium rich material discharged 204.6 mAh/g for the first time at the current of 1C, and 164.4 mAh/g after 150 charge and discharge cycles with corresponding capacity retention rate of 80.35%, compared with the retention rate of 57.26% for pristine Li-rich material capacity. After being stored in humid air for 40 days, the CeO 2 inlaid lithium-rich material showed better electrochemical performance than the pristine one. It is powerfully demonstrated that the CeO 2 inlay strategy here holds huge promise for surface modification of electrode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
锂离子电池
·
能源存储
·
无机非金属材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 47
·37830-37836
·
IF 3.84
Wei Wei,Linlin Guo,Xiaoyang Qiu,Peng Qu,Maotian Xu,Lin Guo
Although many routes have been developed that can efficiently improve the electrochemical performance of LiFePO4 (LFP) cathodes for Li-ion batteries, few of them meet the urgent industrial requirements of large-scale production, low cost and excellent performance. In this work, using a hydrothermal synthetic process followed by high-temperature lithiation, we are able to design a porous micro-spherical LFP/carbon nanotubes (CNTs) nanocomposite. The efficient combination of the inner CNTs and the outer carbon layer along with the porous structure of the LFP/CNT nanocomposite lead to its excellent electrochemical performance. As a cathode material for Li-ion batteries, the discharge capacity of the nanocomposite can reach 122 mA h g−1 at 20 C. After 500 cycles, a capacity retention of 94.3% can be reached at 1 C. Because of the facile and easily scaled up synthetic method, low-cost raw materials and excellent electrochemical performance, the as-designed LFP/CNT nanocomposite can be expected to be a potential cathode candidate for Li-ion batteries.
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xiaoyan Yu,Meng Li,Jun Ma,Yue Wang,Jingyi Qiu,Wenjie Meng,Zhenwei Zhu,Gaoping Cao,Yuehua Wen
Composite polymer electrolytes (CPEs) made of poly(ethylene oxide) (PEO) have potential applicability in future solid-state rechargeable Li-metal batteries (LMBs). However, the interfacial instability between high-voltage cathodes (HVC) and PEO-based CPEs currently limits their use in high-energy-density (HED) LMBs. In this study, an innovative interface engineering method is demonstrated to enhance interfacial stability by impregnating LiTFSI and LiDFOB dissolved in molten poly(ethylene glycol) dimethyl ether (PEGDME) in the cathode-contacting layer. The resulting dual-salt-containing polymer interphase displays high ionic conductivity, improved film-forming properties, and robustness. The interface-modified PEO-based CPEs have good interfacial adhesion with HVC. When charged to 4.3 V in the CPEs, the LiCoO2||Li cell delivers a superior rate capability at 60 °C, achieving stable cycling while retaining 87.2% of the initial capacity after 200 cycles at 60 °C and 86.6% after 460 cycles at 50 °C. This work provides a novel and viable approach to enhance the interface stability between PEO-based CPEs and high-voltage cathodes, advancing the development of safe LMBs with HED.
研究领域:
材料科学
·
储能技术
·
电化学
·
聚合物科学
·
锂离子电池
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Xinmiao Liang,Li Yang,Youyi Lei,Luyao Qu,Liying Wang,Wuyao Cai,Ke Xu,Yangming Jiang,Biaolan Liu,Jiwen Feng
The fast ionic conductor Li10GeP2S12 (LGPS) exhibits exceptionally high ionic conductivity at room temperature, which is attributed to the two-dimensional (2D) pathways that connect the one-dimensional (1D) Li-ion fast diffusion tunnels. These anisotropic transport pathways for Li ions can be modulated by isovalent substitution of the Ge element by Sn or Si. In this work, we use multiple 7Li and 31P solid-state nuclear magnetic resonance (ss-NMR) methods to study the effects of Ge substitution with Sn on 1D and 2D Li-ion dynamics as well as conductivity. Like its analogue LGPS, Li10SnP2S12 (LSPS) also exhibits two distinguishing Li-ion diffusion paths, i.e., a 1D channel along the c-axis and 2D ab-plane diffusion, characterized by activation energies of 0.17 eV at low temperatures and 0.13 eV at high temperatures. It is interestingly found that replacing Ge with Sn blocks most of the Li(4)–Li(1) diffusion pathways in the ab-plane and only approximately 10% of the Li(4) sites on average remain active for in-plane Li diffusion. This element substitution, however, does not significantly modulate the 1D in-channel Li-ion diffusion. Such a substitution-induced heavy blockage of the in-plane Li(4)–Li(1) ion diffusion pathways is thus responsible for the reduced room-temperature conductivity of LSPS. Our results provide a new insight toward understanding the structure–conductivity relationship and the strategy of tuning the ionic conductivity.
研究领域:
材料科学
·
固态化学
·
储能
·
电化学
·
核磁共振（NMR）
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Xiujing Lin,Tingting Zhang,Chengcheng Chu,Zhuang Li,Ruiqing Liu,Pan Li,Yi Li,Zhendong Huang,Yanwen Ma
Lithium–oxygen (Li–O2) batteries, profiting by their super high theoretical energy density and oxygen-breathing electrodes, have attracted extensive concern. The synthesis of the electrode materials with high conductivity and promising cycling durability will be a critical aspect for Li–O2 batteries. In this article, a hybrid composite of CoS2 nanocages derived from ZIF-67 and interconnected by carbon nanotubes (CoS2/CNTs) is prepared and used in the air electrode fabrication for Li–O2 batteries. A reversible capacity of 2398.9 mAh g–1 is obtained, equivalent to 90% of the discharge capacity. When restricting the cycling capacity to 500 mAh g–1, the battery exhibits cycling stability for 52 cycles, with the cutoff potential keeping above 2.0 V. The key point of this material is the formation of porous CoS2 nanocages and insertion of the nanocages with CNTs, forming interconnected electrically conducting networks. The incorporation of CNTs serves as channels for fast electron transfer, which overcomes the poor conductivity of CoS2. Furthermore, the porous CoS2 nanocages could provide affluent active sites for an oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), which also facilitates the diffusion of O2 and the infiltration of electrolytes. The combination of highly conductive CNTs and CoS2 with efficient catalytic activity renders improvement in the battery performance.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Zhenhua Liu,Tengfei Zhang,Shunlong Ju,Yanda Ji,Zhaotong Hu,Yingtong Lv,Guanglin Xia,Xuebin Yu
Lithium borohydride (LiBH4), with high compatibility to lithium anode, low grain boundary resistance, and light mass, is regarded as a promising solid-state electrolyte. However, poor ionic conductivity at room temperature limits its practical application in all-solid-state lithium-ion batteries (ASSLBs). In the present study, Li(NH3)xBH4@SiO2 (0 ≤ x ≤ 0.5) composites were obtained by ammonia absorption and simple ball-milling. Among them, Li(NH3)0.5BH4@SiO2 exhibits a high ionic conductivity of 3.95 × 10–2 S cm–1 at 60 °C, with a lithium transference number up to 0.9999 at 30 °C. More importantly, the experimental results and density functional theory (DFT) calculations show that the skeleton and interfacial interaction of silica can effectively improve the electrochemical performance of the full cell. All-solid-state lithium–sulfur batteries exhibit a specific discharge capacity of 1221.7 mAh g–1 after 10 cycles. Reversible capacities of 1589, 1381, 1176, 969, and 695 mAh g–1 could be achieved at 0.1, 0.2, 0.3, 0.5, and 1C, respectively. These findings prove that Li(NH3)xBH4@SiO2 is an attractive electrolyte for next-generation ASSLBs.
研究领域:
材料科学
·
固体离子学
·
储能
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 14.3
Wanqi Chen,Ruolan Tang,Bo Yang,Wenzhao Sun,Bo Zhang,Peize Lv,Banghe Lv,Haile Yan,Zongbin Li,Song Li,Liang Zuo
The Magnéli-phase λ-Ti 3 O 5 , characterized by its unique flat-band electronic structure, is a promising photothermal conversion material for solar-driven interfacial evaporation. However, its intrinsic thermodynamic instability at ambient temperature severely constrains large-scale practical application. To overcome this challenge, we developed a scalable synthesis strategy for stabilizing λ-Ti 3 O 5 via arc-melting followed by high-energy ball milling, coupled with Lithium (Li) doping. Structural and surface analyses confirm that Li incorporation effectively stabilizes the λ-phase. Morphological studies reveal particle refinement (∼1–2 μm) with increased surface roughness and oxygen vacancies, further enhancing solar absorption with overall reflectivity < 6% in the range of 250–2500 nm. Incorporating 10 wt.% of Li 0.25 Ti 2.75 O 5 particles into a Polyvinyl alcohol/Polyvinylpyrrolidone (PVA/PVP) porous hydrogel evaporator yielded an evaporation rate of 5.22 kg m −2 h −1 under one sun irradiation. Remarkably, the evaporator demonstrated excellent resistance to salt crystallization, maintaining stable performance during a 24-h continuous operation in 3.5 wt.% saline water. This work not only provides a practical and scalable approach for stabilizing λ-Ti 3 O 5 but also offers valuable insights into the development of efficient, durable photothermal materials for solar desalination technologies.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kaixin Ren,Tevin Li,Yun Shen,Guodong Li,Jinyu Yang,Shouyi Yuan,Xiaoli Dong,Fei Wang,Congxiao Wang,Junwei Lucas Bao,Yongyao Xia
Stable cycling of 4.5 V LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) based Li metal batteries is a great challenge as both electrodes work at the extreme voltage. Ethereal electrolytes have been demonstrated to exhibit better stability towards Li metal anode. Unfortunately, their limited electrochemical windows hinder their application in high-voltage Li metal batteries. Herein, we take 1,2-dimethoxyethane molecules as a starting point to design a series of non-fluorinated linear ethereal solvents via either extending the ethylene glycol (EG) units in the backbones or the terminal alkyl group. Further theoretical calculation suggests that with the extension of the EG unit in the backbone, the Li + solvation energy increases, leading to the formation of solvent-separated ion pairs, while the extension of the terminal alkyl chain results in an ion-pair solvation structure due to the steric effect. Consequently, 1,2-dibutoxyethane (EDB) is selected as the solvent for high-voltage Li metal batteries. The 4.5 V Li || NCM811 cells can stably operate over 600 cycles with EDB electrolyte. Notably 1 Ah-level Li || NCM811 pouch cell demonstrates a long cycle life over 100 times, even with a low negative-to-positive capacity ratio of 1.2 and an electrolyte-to-cathode capacity of 2.8 g Ah −1 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Mengling Fang,Zhigang Ning,Jiao Tang,Qinggang Huang,Muhammad Junaid,Yiming Qian,Xuanlin Li,Xin Huang,Haizhou Xue,Jinglai Duan,Jie Liu,Huijin Yao
The escalating demand for lithium-ion batteries necessitates efficient extraction technologies for lithium-rich brines, where the formidable challenge lies in selectively separating Li + from ubiquitous Mg 2+ ions due to their similar sizes. This work addresses this critical separation bottleneck by engineering a high-performance positively charged nanofiltration membrane. We leverage ion-track technology to fabricate a polyethylene terephthalate (PET) substrate featuring vertically aligned, uniformly distributed nanochannels and a hydrophilic, carboxyl-functionalized surface. This optimized substrate facilitates the controlled interfacial polymerization of polyethyleneimine (PEI) and 1,3,5-benzenetricarbonyl chloride (TMC), resulting in a defect-free, robust polyamide selective layer with strong interfacial adhesion. The resultant PEI-TMC/PET-5 membrane exhibits exceptional separation performance, achieving a remarkably high water permeance of 7.6 L m −2 h −1 bar −1 coupled with an outstanding Mg 2+ /Li + separation factor of 29.6. Comprehensive analysis reveals that this superior selectivity stems from the synergistic interplay of the Donnan effect and dielectric exclusion: the membrane's strong positive surface charge electrostatically repels divalent Mg 2+ more effectively than monovalent Li + , while the dielectric discontinuity at the membrane-solution interface imposes significantly higher Born solvation energy and image charge forces on Mg 2+ due to its greater charge density. Critically, the membrane demonstrates notable long-term stability, maintaining 94.5 % Mg 2+ rejection and a stable permeance of 5.1 L m −2 h −1 bar −1 over 720 h of continuous filtration. Under simulated brine conditions (Mg 2+ /Li + = 80:1, 2000 ppm), it further sustains stable performance over two weeks of operation, with a S Li / Mg of 28.8. This study presents a rational substrate-to-active-layer design strategy, underpinned by fundamental insights into ion transport mechanisms, paving the way for scalable and energy-efficient membrane technologies for sustainable lithium extraction from high-magnesium brines.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 11
·4943-4947
·
IF 2.961
Li Ze,Li Yonghua,Xie Huan,Zuo Zhaoyang,Chu Peng
As a kind of anode materials, iron matrix oxide cannot be widely used in the lithium-ion batteries due to their poor electrical conductivity and huge volume change during the electrochemical cycles. Herein, the porous carbon@Fe 2 O 3 composites are prepared by hydrothermal method. Due to the porous structure and introduction of carbon, the electrical conductivity can be greatly improved. Additionally, the porous structure could buffer the volume change during electrochemical cycles. As a result, the as-prepared carbon@Fe 2 O 3 composites deliver a high initial specific capacity of 1168 mAh/g at 0.1 C. Moreover, the carbon@Fe 2 O 3 composites show outstanding rate performance and superior cycling stability. This work provides a potential anode material for high electrochemical performance Li-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
功能复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xiangyang Zhuang,Yao Zhang,Lingxiao He,Yunfeng Zhu,Quan Shi,Quan Wang,Guanzhou Song,Xiaoxiao Yan,Liquan Li
Overheating caused by exothermic effect of magnesiothermic reduction reaction is usually considered as a drawback in preparing porous silicon anode materials for Li-ion batteries. However, in the present work, thermal effect is available in facile preparation of macroporous Si by tabletting pretreatment . The released heat in magnesiothermic reaction is easily accumulated on the tablet with high density, leading to the collapse of the mesoporous structure of the precursor and formation of uniform macroporous silicon . Such macroporous silicon shows a higher initial Coulomb efficiency (86.5%) and enhanced cycling stability in comparison with mesoporous silicon prepared without tabletting treatment. XRD analysis indicates that the reaction temperature decreases to 430–435 °C (based on set temperature), much lower than that of the reaction without pretreatment. Since the structure of product has less dependency on precursor, a wide variety of precursors can be used to synthesize macroporous silicon, e.g. low cost biosilica. Being ascribed to low reaction temperature, heating rate insensitivity, less dependency on precursor, enhanced cycling performance and high initial Coulomb efficiency of the Si products, the modified magnesiothermic reduction method is promising for application in fabricating Si anode.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机合成
·
功能材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Jiabin Hao,Hongli Bai,Jintao Liu,Fangli Yang,Qiling Li,Changwei Su,Junming Guo
A (Li, Cu)-co-doped cathode material Li(Li 0.05 Cu 0.05 Mn 1.90 )O 4 was prepared by a flameless combustion synthesis at 500 °C for 3 h and then two-stage calcination at 700 °C for 6 h. Physical and electrochemical performances were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), galvanostatic charge–discharge cycling test, cyclic voltammogram (CV) and electrochemical impedance spectroscopy (EIS) to investigate the influence of Li and Cu substitution on the lithium ion batteries . Li(Li 0.05 Cu 0.05 Mn 1.90 )O 4 not only exhibited the initial discharge capacity of 106.9 mAh g −1 with a high retention of 89.2% after 500 cycles at 1.0 C but also retained 63.5% capacity after 1500 cycles at 5.0 C. Besides, a good rate capability at different current densities from 0.5 C to 5.0 C can be acquired. The (Li, Cu)-co-doped sample had excellent cycling stability in comparison with the LiMn 2 O 4 cathode.
研究领域:
材料科学
·
电化学
·
储能技术
·
无机合成
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）