ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Shuang-Tao Guo,Shi-Xi Zhao,Kun Bi,Yu-Feng Deng,Kai Xiong,Ce-Wen Nan
In recent years, Li-rich layered cathode materials have caught more and more attention; however, their low-temperature performance have hardly been researched and reported. In this work, typical layered Li-rich oxides (0.55Li 2 MnO 3 ·0.45LiNi 1/3 Co 1/3 Mn 1/3 O 2 ) are successfully synthesized by co-precipitation method. And their electrochemical properties have been investigated emphatically at 25 °C and 0 °C. Results show that the reversible capacity of as-prepared Li-rich oxides exhibit much dependence on temperature from ∼230 mAh·g −1 (25 °C), ∼160 mAh·g −1 (10 °C), ∼70 m mAh·g −1 (0 °C) to ∼50 mAh·g −1 (−5 °C). Our analyses indicate that there are several factors responsible for the capacity loss at low temperature: (1) the deactivation of Li 2 MnO 3 component; (2) the limited kinetic of Li + intercalation into MnO 2 ; (3) the increase of electrochemical impendences, especially the charge-transfer resistance ( R ct ); (4) the decrease of Li ion diffusion coefficient ( D Li+ ). And we find that pre-activation at room temperature is a quite effective way to improve its electrochemical performances at low temperature. In addition to the above four factors, for the first time, we suggest that the lattice contraction with decreasing temperature should also be considered.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 11
·6533-6542
·
IF 10.733
Yi Cao,Pengjian Zuo,Shuaifeng Lou,Zhen Sun,Qin Li,Hua Huo,Yulin Ma,Chunyu Du,Yunzhi Gao,Geping Yin
Lithium–sulfur batteries based on a solid-state sulfide electrolyte show great promise in achieving the next generation of rechargeable chemical power sources with high energy density and long lifespans. However, the poor solid–solid contacts within the electrode and at the electrode/electrolyte interface, as well as lithium dendrite formation and its interaction with sulfide electrolytes during cycling, are significant challenges that must be overcome before the full potential of sulfide electrolyte-based lithium–sulfur batteries can be realized. Here, we propose a [Li(triglyme)]+[TFSI]− (LiG3) solvent-salt complex with an excellent stabilizing effect towards Li10GeP2S12 electrolyte and demonstrate its application in a high-performance solid-state lithium–sulfur battery. A small quantity of LiG3 added into the cathode material dramatically enhanced the Li+ ion transfer and facilitated the transition from a solid–solid redox reaction involving sulfur species to a solid–liquid dual-phase redox reaction. Simultaneously, we achieved a stabilized solid electrolyte interphase layer at the lithium anode side by the in situ electrochemical reduction of LiG3 complex. The solid-state lithium–sulfur cells demonstrated high specific capacities of 1100 mA h g−1 at 0.2C and 650 mA h g−1 at 1.0C. Furthermore, pouch cells with dimensions of 4 × 5 cm2 were successfully fabricated, indicating the promising practical application of these cells in energy storage.
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高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Shidong Song,Dequan Zhang,Yanli Ruan,Limei Yu,Yongqiang Xu,Joykumar Thokchom,Donghai Mei
Heightened attention for solid-state Li–O2 batteries (SSLOBs) exists due to their improved safety, wider electrochemical window, and high energy density in addition to the solid electrolyte’s innate capability of suppressing Li dendrite penetration and shielding the Li metal anode from oxygen, CO2, and moisture in the air, in comparison with the conventional Li–O2 batteries using liquid organic electrolytes. Herein, a cathode supported quasi-SSLOB with an integrated composite polymer-based architecture (ICPA) is developed with reduced interfacial resistance, extended triple-phase boundaries (TPBs) for Li–O2 reactions, and a thin film solid-state electrolyte. The Li–O2 cell with ICPA (denoted as ICPA cell) exhibits a lower charge transfer impedance than its counterpart with the same composite polymer electrolyte (CPE) but a nonintegrated structure (termed the CPE cell). The former shows reduced interfacial impedance between electrolyte and cathode and increased TPBs. Furthermore, the ICPA cell delivers higher discharge capacity, lesser capacity decay, and significantly lower impedance rise after cycles than the CPE cell, ascribed to the continuous Li-ion transport in ICPA and the resulting more efficient discharge and charge processes. Under a limited capacity cycling protocol of 300 mAh g–1, the ICPA cell achieves excellent reversibility for 78 cycles, remarkably surpassing the CPE cell which only performs 44 cycles in addition to showing half of the after-cycle impedance compared to that for the CPE cell. Nonetheless, the same composite polymer electrolyte used for both CPE- and ICPA-based cells demonstrates excellent stability toward Li metal after long-term cycling. These findings manifest that the design and application of cathode supported SSLOB with ICPA can be a promising approach to achieve high-performance Li–O2 batteries.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yaqing Wei,Xuhao Liu,Runzhe Yao,Jiayao Qian,Yiyi Yin,De Li,Yong Chen
The alloying type materials have been proposed to be served as the alternative anode for lithium ion batteries (LIBs) owing to their much higher capacity than graphite. However, those elementary alloying substances still suffer large volume expansion, resulting in much Li-irreversibility of low initial coulombic efficiency (ICE<75%) and fast capacity fading. Herein, inspired by the high entropy concept, we extend the simple elements into the high entropy alloy (HEA) system by rational designing Li-active and high conductive components. Interestingly, one kind atomic disorder HEA composed of Ge-Sn-Sb-Si-Fe-Cu-P is successfully synthesized for the first time, which is surprisingly found delivered ultra-high reversibility (e.g. ICE=91%) for LIBs, combining with suitable plateau (∼0.5 V) and large discharge capacity (1448 mAh/g) as well. Furthermore, such formed HEA nanoparticles are greatly emdedded and encapsulated into carbon matrix to form a dragon-fruit-like HEA/C composite. Benefitted from above unique structural design, the HEA/C composite exhibits superior cyclability (>1600 h operation) and excellent rate performances (787 mAh/g and 63% retention at 2000 mA/g). This successful implement of high entropy concept into alloying type anode materials may open a new avenue to developing series high entropy alloys toward advanced energy storage.
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 55
·34508-34516
·
IF 3.108
Xiaoheng Guo,Huichang Gao,Xiao Liu,Jingjing Diao,Xuetao Shi,Naru Zhao,Yingjun Wang
A well-designed scaffold with accurately controlled structure, pore size as well as interconnection plays a key role in tissue engineering. In this study, porous Li-containing biphasic calcium phosphate scaffolds (Li-BCP) with expected structure were fabricated successfully by 3D plotting technique. The results of scanning electron microscopy (SEM) and micro-CT indicated that scaffolds from 3D plotting possessed an elaborate pore structure, porosity and interconnection. Besides, Li-BCP scaffolds also possessed excellent mechanical strength. Furthermore, in vitro cell experiments confirmed that mouse bone mesenchymal stem cells (mBMSCs) cultured on Li-BCP scaffolds exhibited good adhesion and spreading. Moreover, Li-BCP scaffolds could efficaciously promote the proliferation and osteogenic differentiation of mBMSCs, demonstrating their potential applicability as a candidate for bone repair applications.
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DOI
高影响因子
HYDROMETALLURGY
·
2021
·
IF 4.156
Licheng Zhang,Lianmin Ji,Lijuan Li,Dong Shi,Taoshan Xu,Xiaowu Peng,Xuexue Song
A method of recovering cobalt, nickel, and lithium from mixed solutions was proposed based on β-diketone solvent extraction using benzoyltrifluoroacetone (HBTA), trioctylphosphine oxide (TOPO), and green kerosene. The effective metal recovery and separation parameters such as solution pH, saponification degree, extraction time, and phase ratio were evaluated experimentally. The results indicated that cobalt and nickel were recovered through 2-stage cross-current extraction at different phase ratios and that lithium was recovered through three-stage countercurrent extraction. The metal-loaded organic phase was stripped using an inorganic acid solution to obtain cobalt-, nickel-, and lithium-concentrated solutions. The Co/Ni and Ni/Co molar ratios in the cobalt- and nickel-concentrated solutions were 54.4 and 164, respectively, and the lithium concentration reached 1.78 × 10 4 mg L −1 in the lithium-enriched solution. The extraction mechanism was studied, and the results revealed that Co 2+ and Ni 2+ were extracted by ion exchange in which two moles of H + or Na + had been replaced by divalent metal ions . The Li + extraction stoichiometry was studied by cultivating single crystals. Because cobalt, nickel, and lithium were recovered by single extraction, no other organic substances were required. This work provides a sustainable, environmentally friendly, and versatile method of recovering valuable metals from spent lithium batteries .
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Fangkun Li,Xinyi Wang,Weixin He,Xijun Xu,Zhengbo Liu,Jiadong Shen,Yunfei Hu,Zhonghua Chen,Jun Liu
A simple, economical, and easily scalable high-energy ball-milling method for the synthesis of Li 2 GeO 3 /expanded graphite (LGO/EG) as a high-performance anode for lithium-ion batteries is reported. The LGO/EG exhibits a unique architecture with expanded graphite (EG) uniformly coating Li 2 GeO 3 (LGO) particles, which effectively inhibited the agglomeration of LGO particles. The LGO/7 wt%EG anode delivers a discharge capacity of 800.6 mA h g −1 at 5.0 A g −1 , with an outstanding capacity retention of 75.9% after 300 cycles at 1.0 A g −1 , which is 8.3% higher than that of the uncoated LGO anode. This is attributed to the introduction of EG which improves the electronic conductivity of LGO, and the uniformly coated EG can effectively inhibit the volume change of LGO particles during the charging-discharging process. As a result, LGO/EG has outstanding high-rate performance and long-term cycle stability.
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高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Qian Zhao,Weizong Wang,Cheng Ruan,Zhengping Ding,Yurong Ren
Chloride-based solid-state electrolytes (SSEs) have attracted significant attention due to their favorable combination of ionic conductivity and electrochemical stability. However, chloride SSEs exhibit lower ionic conductivity than sulfides and liquid electrolytes, along with Li metal instability, hindering their high-rate all-solid-state battery (ASSB) applications. Previous studies have emphasized a cation substitution strategy, particularly high-entropy design, to enhance ionic conductivity, while anion substitution remains an underexplored yet promising alternative. Herein, through low-content Br substitution, Li3InCl5.9Br0.1 is synthesized via mechanical ball milling and achieves a room-temperature ionic conductivity of 1.30 mS cm–1, which represents a 48% enhancement over pristine Li3InCl6 (0.88 mS cm–1). Combined experimental and theoretical analyses reveal that the enhanced ionic conductivity stems from moderate local lattice distortion and optimized Li–Cl/Br bond lengths that facilitate Li+ conduction. The assembled LiCoO2|Li3InCl5.9Br0.1|Li6PS5Cl|Li–In ASSBs significantly demonstrate 81.89% capacity retention after 100 cycles at 0.2C (vs 70.55% for ASSBs with pristine Li3InCl6), along with improved rate performance. This work provides a reliable strategy of low-content Br– substitution to develop advanced chloride SSEs for application in ASSBs.
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产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2014
·Vol. 30
·期 1
·150-156
·
IF 0.886
YANG Bing-Jian,WANG Hong,Li Lei,HUANG Bo-Wen,LIAO Xiao-Zhen,HE Yu-Shi,MA Zi-Feng
The development of low-cost and effective electrocatalysts for air electrodes is critical for practical applications of lithium/oxygen batteries. In the present work, phenanthroline (phen) was used as a ligand to prepare a Co(phen)2 complex. The Co(phen)2 complex
was coated on BP2000 and then heat treated at 600, 700, 800, and 900 , to obtain carbon-supported Co-N (Co-N/C) catalysts. The catalytic activities in oxygen reduction reaction/oxygen evolution reaction (ORR/OER) of the prepared catalysts were measured and compared with those of a typical
carbon-supported cobalt tetramethoxyphenylporphyrin (CoTMPP/C) catalyst. The influence of the calcination temperature on the composition and structure of the Co-N/C catalysts was investigated. Electrochemical tests showed that the Co-N/C catalysts prepared at 700 and 800 gave better performances,
comparable to that of the CoTMPP/C catalyst. The superior electrochemical performance of the prepared Co-N/C catalysts and the low cost of the phenanthroline chelating agent make Co-N/C a promising cheap catalyst for lithium/oxygen batteries.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Miaomiao Cao,Wanbao Wu,Ruitian Guo,Yihong Liang,Guangxing Pan,Hao Wu,Xiangli Liu,Jiaheng Zhang
The construction of carbon-encapsulated transition metal nanotube structures is a preferred method that can effectively slow down volume expansion, improve cycling stability and enhance the electrical conductivity of the reactive sites of lithium-ion batteries. In this study, nanotubes of carbon-coated NiCo-NiCo 2 O 4 nanoparticles (NC-NCO@C) were prepared by a one-step molten salt method at high temperature using Ni and Co as catalytic centers and sodium acetate as carbon source. We used NC-NCO@C-2 nanotubes as anode materials for lithium-ion batteries(LIBs), which exhibited excellent lithium storage performance and good stability, with a specific capacity of 616.26 mAh g −1 after 1000 cycles at a high current density of 1 A g −1 . In addition, NC-NCO@C-2 were used as anodes in lithium-ion full cells and LiFePO 4 (LFP) was used as the cathode. The NC-NCO@C-2//LFP full-cell exhibits high capacity and good cycling stability, with a capacity of 100.7 mAh g −1 after 100 cycles and a capacity retention rate of 92%. The construction of NC, NCO, and carbon ternary complexes was found to activate and promote the reversible conversion of certain inorganic components at the solid electrolyte interfaces (SEI), which effectively reduced the volume change during cycling, increased the electrical conductivity, and improved the cycling stability of the electrode. The proposed one-step molten salt synthesis of Carbon-coated metals complexes with excellent compatibility characteristics, is expected to solve the problem of volume change in transition metals, which is encountered in LIBs applications.
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Huidong Gu,Chang Feng,Hai-ou Zhu,Haikui Zhu,Xifeng Ding,Lixi Wang,Guohui Zhou,Meng Wang,Shiwo Ta,Qitu Zhang
Li 3 PO 4 ceramic is a promising microwave ceramic material with low dielectric constant. The effect of Li nonstoichiometry on phase compositions, microstructures, and microwave dielectric characteristics of Li 3 PO 4 ceramics, on the other hand, has been examined infrequently. Therefore, in the first part of this study, the stoichiometry and Li nonstoichiometry compositions based on Li 3+x PO 4 (x = 0, 0.03, 0.06, 0.09, 0.12 and 0.15) were prepared by conventional solid-phase method. The results show that a few nonstoichiometric lithium ions enter the lattice of Li 3+x PO 4 . Compared with the chemical content of Li 3 PO 4 , the sintering characteristics, relative dielectric constants and quality factors of Li 3+x PO 4 ceramics can be improved by slightly excessive Li ions, while the properties of Li 3 PO 4 ceramics can be deteriorated by excessive Li ions. Li 3.12 PO 4 ceramics sintered at 975 °C for 2 h have good dielectric properties ( ε r = 5.89, Q×f = 44,000 GHz, τ f = −206 ppm/ ° C). In order to improve its large negative temperature coefficient of resonant frequency, in the following study, rutile nano TiO 2 particles were added as τ f compensator. Adding TiO 2 powders not only effectively improve the temperature stabilities of the multiphase ceramics, but also make the grain growth more uniform. With the increase of TiO 2 content from 0.40 to 0.60, τ f increases from −73.5 ppm/ ° C to +42.3 ppm/ ° C. The best dielectric property of 0.45Li 3.12 PO 4 -0.55TiO 2 composite ceramic is ε r = 13.29, Q×f = 40,700 GHz, τ f = +8.8 ppm/ ° C.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Congcong Dang,Pu Feng,Sixian He,Liancheng Zhao,Aidang Shan,Ming Li,Lingti Kong,Liming Gao
The design of ultra-stable cathode materials of Li-O 2 batteries with excellent catalytic performance is very important and desirable. However, some problems such as sluggish electrochemical reaction kinetics and unwanted side reactions still remain challenging. Carbon materials own hierarchical porous structure which facilitates mass transport and accommodates discharge products but are not stable enough as cathode of Li-O 2 batteries. Here in, we fabricated a unique NiCo bimetallic phosphide combined with carbon nanotube heterostructure (abbreviated as NiCoP/CNT) by hydrothermal method. Density functional theory (abbreviated as DFT) calculation demonstrates that bimetallic phosphide NiCoP/CNT delivered much better electrical conductivity, greater adsorption to reactants, and more electron transfer with discharge products Li 2 O 2 , compared to monometallic phosphides CoP and Ni 2 P. Therefore, NiCoP/CNT based cathode displayed low overpotential of 0.87 V at current of 100 mA g −1 with a fixed specific capacity of 1000 mAh g −1 and run steadily over 150 cycles under high current of 500 mA g −1 with a fixed specific capacity of 1000 mAh g −1 . Furthermore, Ex-situ X-ray Photoelectron Spectroscopy and in-situ differential electrochemical mass spectroscopy proved the existence of intermediate products Li 2-x O 2 . This approach provides a reference for designing and synthesis of bimetallic cathode in Li-O 2 batteries.
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高影响因子
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