Nano Energy
·
2024
·
IF 16.8
Jinwei Chen,Yuxuan Liu,Fanbo Meng,Shiman He,Jun Liu,Yujun Zhao,Kaiqiang Song,Renzong Hu,Min Zhu
Subzero temperature severely forbids the transfer of lithium ion (Li + ) between electrodes and the diffusion of Li + in interphase, which become one of the slowest steps. Especially in silicon-based battery systems, the continuous thickening and poor ionic conductivity of interface make this challenge more prominent. Maintaining a thin interface with superior ionic conductivity is an effective strategy to develop low temperature silicon-based batteries. Herein, a ternary hybrid solid electrolyte interface containing F, N, S was constructed by electrolyte design to improve Li + interface transport kinetics. Benefited from robust mechanical property of inorganics and high ionic conductivity of Li 3 N and Li x SO y , the hybrid interface sustains a thin thickness over cycles and behaves significantly reduced energy barrier for Li + diffusion. Thus, such interface enables Si-C||LCO pouch cell to maintain a high capacity retention of 56.4 % of the room-temperature capacity at −30℃, and retain 87.4 % of the capacity after 200 cycles. Even at −40℃ and a high loading of 3mAh/cm 2 , the cell can still be charged and provide a specific capacity of about 310 mAh/g with almost no capacity attenuation after 50 cycles. This work demonstrates the important role of excellent interface for low temperature silicon-based batteries, and provides a reference for the design of rapid Li + transport interface.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Ru-Jun Chen,Yi-Bo Zhang,Ting Liu,Bing-Qing Xu,Yang Shen,Yuan-Hua Lin,Ce-Wen Nan
Li–La–Zr–O thin films were successfully fabricated using the sol-gel spin coating method and the effects of the addition of surfactant in the solution were studied. X-ray diffraction, scanning electron microscopy and Atomic Force Microscope were used to investigate the characteristics of these films and an amorphous structure and smooth surface on the films were revealed. The ionic conductivity of the film was investigated by impedance analysis. The results showed that the room-temperature ionic conductivity of the film increases with the content of surfactant, from 1.8 × 10 −6 S/cm for 0.5 wt% to 3.9 × 10 −6 S/cm for 1.5 wt%. However, further increasing the content of surfactant can deteriorate the property of the thin film on the contrary. The improvement of the property can be attributed to the improvement of the morphology of the film. We propose that this Li–La–Zr–O thin film is a promising solid electrolyte for thin-film lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Cheng-Dong Li,Jin Xu,Ji-Sheng Xia,Wei Liu,Xin Xiong,Zhu-An Zheng
The FeF 3 -coated Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 cathode materials were synthesized via a wet chemical process followed by a solid state reaction . The physical properties of the as-prepared samples were conducted using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy . The results indicated that the surface of cathode particles was covered by FeF 3 film (about 5–15 nm thick). Compared with the bare cathode, the FeF 3 -coated Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 one delivered the higher coulombic efficiency, better rate capability, longer cycle life, and better structure stability. A high capacity retention of 95% (190 mAh g − 1 ) after 100 cycles at 0.5 C rate was obtained for the FeF 3 -coated Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 cathode. Besides, the results from cyclic voltammetry and electrochemical impedance spectra revealed that the noteworthy enhanced electrochemical properties of the surface-modified sample were due to the presence of FeF 3 coating layer , which suppressed the side reaction between the Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 particles with electrolyte and further stabilized the Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 structure with cycling.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Kai Liu,Fei Ding,Jiaquan Liu,Qingqing Zhang,Xingjiang Liu,Jinli Zhang,Qiang Xu
A cross-linking succinonitrile (SN)-based composite polymer electrolyte (referred to as “CLPC–CPE”), in which vinyl-functionalized SiO2 particles connect with trimethylolpropane propoxylate triacrylate (TPPTA) monomers by covalent bonds, was prepared by an ultraviolet irradiation (UV-curing) process successfully. Vinyl-functionalized SiO2 particles may react with TPPTA monomers to form a cross-linking network within the SN-based composite polymer electrolyte under ultraviolet irradiation. Vinyl-functionalized SiO2 particles as the fillers of polymer electrolyte may improve both the thermal stability of CLPC–CPE and interfacial compatibility between CLPC–CPE and electrodes effectively. There is no weight loss for CLPC–CPE until above 230 °C. The ionic conductivity of CLPC–CPE may reach 7.02 × 10–4 S cm–1 at 25 °C. CLPC–CPE has no significant oxidation current until up to 4.6 V (vs Li/Li+). The cell of LiFePO4/CLPC–CPE/Li has presented superior cycle performance and rate capability. The cell of LiFePO4/CLPC–CPE/Li may deliver a high discharge capacity of 154.4 mAh g–1 at a rate of 0.1 C after 100 charge–discharge cycles, which is similar than that of the control cell of LiFePO4/liquid electrolyte/Li. Furthermore, the cell of LiFePO4/CLPC–CPE/Li can display a high discharge capacity of 112.7 mAh g–1 at a rate of 2 C, which is higher than that of the cells assembled with other plastic crystal polymer electrolyte reported before obviously.
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Ruihong Li,Junli Li,Kaiyu Qi,Xin Ge,Qiwei Zhang,Bangwen Zhang
Silicon is one of the most promising candidates for next-generation anode of Lithium-ion batteries. However, poor electrical conductivity and large volume change during alloying/dealloying hinder its practical use. Here we reported a three-dimensional (3D) nitrogen and sulfur codoped graphene supported silicon nanoparticles composite (SN-G/Si) through one-step hydrothermal self-assembly. The obtained SN-G/Si was investigated in term of instrumental characterizations and electrochemical properties. The results show that SN-G/Si as a freestanding anode in LIBs delivers a reversible capacity of 2020 mAh g −1 after 100 cycles with coulombic efficiency of nearly 97%. The excellent electrochemical performance is associated with the unique structure and the synergistic effect of SN-G/Si, in which SN-G provides volume buffer for nano Si as the flexible loader, short paths/fast channels for electron/Li ion transport as porous skeleton, and low charge-transfer resistance.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Xiaobo Jia,Mo Yan,Ziyou Zhou,Xianglei Chen,Chao Yao,De Li,Daming Chen,Yong Chen
Layered Nd-doped LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) compounds were successfully synthesized via a coprecipitation-assisted solid-phase method in this work. The effects of Nd doping on the crystal structure, morphology, and electrochemical properties were characterized thoroughly using XRD, SEM, TEM, EDX, and electrochemical tests. Rietveld refinement of the X-ray diffraction data indicated that the Nd-doped samples had lower cation mixing than the raw NCM523. The SEM and EDX mapping characterization results demonstrated that Nd atoms were uniformly distributed in NCM523. At 1C and 10C, the Li(Ni 0.5 Co 0.2 Mn 0.3 ) 0.992 Nd 0.008 O 2 materials exhibited initial discharge capacities of 189.7 and 101.5 mAh g −1 , respectively, with capacity retentions of 83.3% and 88%, respectively, compared to those of NCM523 (68.1% and 52.5%, respectively) with a cutoff voltage of 4.8 V after 100 cycles. It was found that NCM523 doped with Nd 3+ ions can expand lithium ion diffusion channels in the layered structure and stabilize the structure of the material.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2015
·
IF 2.133
Yunsheng Liu,Dajiang Mei,Jingli Xu,Yuandong Wu
New alkali metal zinc selenites, A 2 Zn 3 (SeO 3 ) 4 · X H 2 O (A=Li, Na, K; X =2 or 0) were prepared through hydrothermal reactions . Li 2 Zn 3 (SeO 3 ) 4 ·2H 2 O ( 1 ) crystallizes in the monoclinic space group P 2 1 / c with lattice parameters a =8.123(4), b =9.139(4), c =7.938(3) Å, β =112.838(9)°. Na 2 Zn 3 (SeO 3 ) 4 ·2H 2 O ( 2 ) crystallizes in the monoclinic space group C2/c with lattice parameters a =15.7940(18), b =6.5744(8), c =14.6787(17) Å, β =107.396(3)°. K 2 Zn 3 (SeO 3 ) 4 ( 3 ) crystallizes in the monoclinic space group C2/c with lattice parameters a =11.3584(12), b =8.6091(9), c =13.6816(14) Å, β =93.456(2)°. The anionic structures are composed of [Zn 3 O 12 ] 18− sheets, chains, and “isolated” units in compound 1, 2, 3, respectively, and trigonal pyramids SeO 3 2− . The compounds were characterized by the solid state UV–vis–NIR diffuse reflectance spectroscopy , infrared spectra and thermogravimetric analysis .
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2017
·
IF 0
Rutao Wang,Shijie Wang,Dongdong Jin,Yabin Zhang,Yaojun Cai,Jianmin Ma,Li Zhang
Two dimensional layered MoS 2 has demonstrated great promise as an ideal alternative to graphite-based anodes for hybrid Li-ion capacitors and Li-ion batteries. Research effort on this material has focused mainly on synthesizing highly nanostructured MoS 2 that allows reducing the dimensions into nanoscale to cross over the sluggish kinetics of Li-ion charge storage. Herein, we engineer the layer structure of MoS 2 to preferentially expand the interlayer distance to increase atomic interface contact/interaction by successfully inserting amorphous carbon layer into adjacent MoS 2 monolayers. This interlayer modified MoS 2 is demonstrated to have the predominantly pseudocapacitive characteristics and can get further gains in Li-ion storage properties through incorporating reduced graphene oxide (RGO). Thus, a novel hybrid Li-ion capacitor is fabricated by employing this MoS 2 -RGO composite as the anode and activated carbon as the cathode, which exhibits an ultrahigh specific energy density of 188 Wh kg -1 at 200 W kg -1 and remains 45.3 Wh kg -1 even at a high specific power density of 40,000 W kg -1 as well as long cycle life. This work shows that engineering interlayer structure and introducing conductive graphene can significantly impact the Li-ion storage properties, enabling new opportunities for designing newly advanced MoS 2 anodes for next-generation energy storage devices.
✓ 已验证
产品关联
DOI
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Peng Chen,Siyang Tang,Hairong Yue,Changjun Liu,Chun Li,Bin Liang
A new method coupling CO2 mineralization and solvent extraction was proposed and investigated to precipitate magnesium from high Mg/Li ratio brine. Organic amine was employed to extract HCl formed during the CO2 mineralization process and to realize continuous conversion of MgCl2 to precipitated MgCO3, thereby removing the magnesium contained in the brine. The effects of brine concentration, extractant, diluents, extractant concentration, phase ratio, and reaction temperature were systematically investigated. A blend of trioctylamine and isoamyl alcohol was used as the extractant and diluent, and the reaction parameters were optimized. The mechanism was proposed, and a stripping process was designed. Under the optimal conditions, the conversion of magnesium was as high as 67.41%, and the Mg/Li ratio of the raffinate decreased from 20 to 5.4.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2024
·
IF 6
Zhi-Ping Huang,Hui-Li,Wei-Ze Wang,Hu Li,Li-Mei Lin,Zhi-Gao Huang,Shui-Yuan Chen,Gui-Lin Chen
Sb 2 (S,Se) 3 is a promising photovoltaic material due to its tunable bandgap, high thermal stability, and low-cost production potential. However, films produced by close-spaced sublimation (CSS) often suffer from defects that reduce efficiency. In this work, lithium (Li) doping was introduced to improve crystal quality, carrier concentration, and conductivity. The lithium was incorporated into the sublimation source via molten salt treatment, resulting in a uniform Li-Sb 2 (S,Se) 3 thin film. The resulting ITO/CdS/Li-Sb 2 (S,Se) 3 /PbS/Carbon solar cell achieved a power conversion efficiency of 6.18%, a significant improvement over undoped devices. The study further investigates the optoelectronic properties, revealing that Li doping effectively reduces non-radiative recombination, improves carrier extraction, and increases the valence band maximum (VBM), optimizing energy level alignment for enhanced hole transport. Additionally, the improved surface conductivity and higher carrier concentration due to Li doping contributed to enhanced carrier transport and reduced recombination.This research demonstrates that alkali metal doping can enhance the optoelectronic properties of Sb 2 (S,Se) 3 films, providing a pathway for further efficiency improvements in antimony-based thin-film solar cells.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Wei Liu,Xin Geng,Hailong Wang,Jing Chen,Chenyang Wang,Nian Zhang,Ahmed M. Hashem,Wei Chu,Xin He
Lithium (Li) - and manganese (Mn)-rich oxides ( x Li 2 MnO 3 ·(1− x ) Li TM O 2 , TM = Ni, Co, Mn, etc.) are one of the most promising cathode materials because of their high theorical capacity, which is contributed by the redox of both transition metal cations and oxygen anion. However, anionic redox leads to transition-metal migration and release of lattice oxygen, which further triggers voltage decay and capacity fade. Here, we report a dual-doping and multiphase co-existence strategy to tackle the structure degradation of Li- and Mn-rich materials and enhance electrochemical kinetics. La–Ti dual cations doping strength the TM -O bonds and improve cycling stability, and the inducement of LaMnO 3+ δ (LaMO) phase provides higher conductivity. As a result, the unique architecture presents a favourable rate performance, improved capacity retention, and suppressed voltage decay. After 200 cycles at 1C (250 mA g −1 ), the La–Ti dual cations doped Li-and Mn-rich material shows 24 % higher capacity retention and 52 % lower voltage decay compared to the non-doped material. This study demonstrates the potential of dual transition-metal ion doping combined with doping-induced perovskite phase to enhance the performance of Li- and Mn-rich materials.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Gaoyu Zhou,Jiangmin Jiang,Qilin Feng,Fei Zhou,Xia Qiu,Yaxin Chen,Xiangkai Kong,Zhicheng Ju,Yanhua Cui,Quanchao Zhuang
Lithium/fluorinated carbon (Li/CF x ) batteries have garnered significant interest because of their exceptionally high theoretical energy density compared to other primary energy storage systems. However, the slow ionic transport of the electrolyte during the discharge phase restricts its ability to achieve the theoretical maximum. Herein, a novel high-concentration electrolyte is proposed based on one salt (lithium tetrafluoroborate (LiBF 4 )) and two high dielectric constant solvents (propylene carbonate (PC) and N,N-dimethylacetamide (DMAC)). This innovative electrolyte formulation has significantly enhanced a notable improvement in the discharge performance of Li/CF x batteries. Specifically, Li/CF x batteries used of the high-concentration electrolyte demonstrate a higher discharge voltage platform of 2.68 V (compared to 2.50 V with a commercial electrolyte) and a higher energy density of 2175 Wh Kg −1 ( vs 1928 Wh Kg −1 with a commercial electrolyte) at a current density of 50 mA g −1 . Notably, the overall performance improvements are largely due to the utilization of a high-concentration electrolyte with high ionic conductivity and regulated solvation structure (with less coordinated solvents), leading to the superior Li + transport and facilitating more effective participation of Li + and CF x in the reaction, thereby boosting capacity. This strategy offers valuable insights into electrolyte design for the improvement of electrochemical performance of Li/CF x batteries.
✓ 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）