JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Zhantao Liu,Xusong Qin,Hui Xu,Guohua Chen
In this study, a one-pot sintering process incorporating sol–gel preparation route and in-situ carbon coating was proposed for the synthesis of carbon-coated nanosized LiTi 2 (PO 4 ) 3 . Experimental results show that the prepared LiTi 2 (PO 4 ) 3 particles are of high crystallinity and well-coated by turbostratic carbon. Attributed to nanosized particles and enhanced conductivity provided by turbostratic carbon coating, the carbon-coated LiTi 2 (PO 4 ) 3 showed high rate performance and good cycling life in aqueous electrolyte. Particularly, the carbon-coated LiTi 2 (PO 4 ) 3 exhibited initial specific capacities of 103 and 89 mAh g −1 , and retained 80.6% and 97% of the initial capacities after 120 cycles at 1C and 10C in aqueous electrolyte, respectively. The high rate performance and good cycling life of carbon-coated LiTi 2 (PO 4 ) 3 in aqueous electrolyte reveal its potential as negative electrode in aqueous lithium-ion batteries for electric vehicles and industrial-scale energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Shujiao Yang,Zhihua Zhang,Lin Shen,Peng Chen,Zhi Gu,Mingyuan Chang,Yue zhao,Hao He,Xiayin Yao
An asymmetric solid polymer electrolyte (ASPE) is designed as two-in-one layered structure driven by gravity and in-situ polymerization. The rigid layer composed of polymer embedded three-dimensional continuous Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) framework improves the Li + transference number and critical current densities. The soft poly(ethylene glycol) (PEG) layer prepared via thermal polymerization by poly(ethylene glycol) methyl ether methacrylate (PEGMEM) makes good interfacial contact with cathodes. Driven by gravity, the two layers are automatically stratified during the polymerization. By virtue of this structural merit, the Li + transference number of PEG@LAGP ASPE extends to 0.144 (vs. 0.083 of PEG SPE), and symmetric Li/PEG@LAGP ASPE/Li cells can stably cycle over 400 h at current density of 0.5 mA cm −2 under 60 °C. LiFePO 4 /PEG@LAGP ASPE/Li cell exhibits excellent electrochemical performance at 2.5 C (0.5 mA cm −2 ) under 60 °C, reaching to a maximum specific capacity of 130.8 mA h g −1 and a capacity retention of 87.2% after 1000 cycles. Furthermore, the cells operating at high rates or high temperatures also have been demonstrated. This work provides a promising electrolyte design strategy for all-solid-state batteries with superior interface compatibility and long cycle life.
研究领域:
材料科学
·
电化学
·
储能技术
·
高分子科学
·
电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yue Jiang,Zhiwei Hu,Qiaohong Yan,Xiaohong Zhu
All-solid-state lithium batteries have great potential applying to the fields of transportation and portable devices because of their high safety and energy density as the power source. As a critical component of device, solid-state electrolyte has been paid much attention. Given the excellent physical and chemical stability, Li 1+ x Al x Ti 2- x (PO 4 ) 3 (LATP)-based electrolyte has been considered as one of the most promising electrolytes for the next generation batteries. However, a further promotion of its ionic conductivity becomes extremely difficult, originating mainly from the poor connection of grains and a low relative density of LATP. Here, the nanosized and homogenous LATP ( x = 0.3) powders were synthesized through reducing the agglomeration of precursor powders and preparing at low temperatures. It is revealed that uniformly superfine LATP powders are able to improve the microstructure of grain boundaries during the pellet sintering process, thereby reducing the grain boundary resistance. Furthermore, as-synthesized nanosized powders mixed with Bi 2 O 3 additive present a better enhancement on the connection of grains and the relative density in LATP. On the basis of this understanding, we prepared LATP electrolytes with 0.5 wt% Bi 2 O 3 exhibiting a high ionic conductivity of 8.56 × 10 −4 S/cm, a high relative density of 94.4 % and a low activation energy of 0.27 eV, which is demonstrated as a prospective electrolyte in all-solid-state lithium battery LiFePO 4 /PEO/LATP/PEO/Li.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Changzhi Sun,Xiao Huang,Jun Jin,Yang Lu,Qing Wang,Jianhua Yang,Zhaoyin Wen
Lithium (Li) metal plays an indispensable role in Li-S batteries , but its fast degradation seriously impedes the practical application of Li-S batteries. Here, an ion-conductive LAGP-based composite protective layer (CPL) consisting of lithium aluminum germanium phosphate (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ) and polyvinylidene fluoride (PVDF) is prepared on Li metal anode via a facile casting method. In the presence of LAGP, the negative effect of CPL on the diffusion of Li + is minimized. Hence, it can not only effectively resist corrosive action of lithium polysulfides (LiPSs) on Li metal anode, but also reduce interfacial polarization and restrain dendritic Li growth. The protected Li anode exhibits exceptional cycling stability and low voltage polarization (∼30 mV at 0.5 mA cm −2 ) for 300 h. The electrochemical performance of Li-S batteries with protected Li anode is also greatly enhanced. The discharge specific capacity of 832.1 mAh g −1 and an average coulombic efficiency of 92% are obtained for up to 100 cycles at 0.5 C in LiNO 3 -free electrolyte. Additionally, the rate capability of Li-S batteries is significantly improved, delivering a reversible capacity of 565 mAh g −1 at 4 C. Our results also indicate this protection strategy can be extended to the Li-S pouch cells.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Kunqi Liu,Junxia Wang,Jin Wang,Long Kang,Jun Li,Die Liu,Yuan Liu,Qing Tao
To explore the application potential of ceramic waste forms for immobilizing multiple nuclides in high-level waste, a systematic study was conducted on (1- x )Sr 0.5 Zr 2 (PO 4 ) 3 - x Ce 0.5 Sm 0.5 PO 4 ( x = 0, 0.5, and 1) ceramics, focusing on their chemical and irradiation stability. The composite ceramics can simultaneously immobilize multiple nuclides (Sr, Ce, and Sm), while retaining a homogeneous microstructure and high relative density (>97%). Static leaching experiment indicated low normalized leaching rates: LR Sr ∼ 10 -4 -10 -3 g·m -2 ·d -1 , LR Ce ∼ 10 -8 -10 -7 g·m -2 ·d -1 , and LR Sm ∼ 10 -7 -10 -6 g·m -2 ·d -1 . Different leaching behaviors of nuclides (Sr, Ce, Sm) were further identified using the de Groot and van der Sloot model. With 5 MeV Xe 20+ irradiation at a fluence of 2.5×10 15 ions/cm 2 , Sr 0.5 Zr 2 (PO 4 ) 3 phase in the composite ceramics can still maintain part of its crystal structure, while Ce 0.5 Sm 0.5 PO 4 phase tends to amorphize. Interestingly, subsequent TEM observation further vitrificated the Xe 20+ -induced amorphous Ce 0.5 Sm 0.5 PO 4 phase recrystallizes under electron-beam (e-beam) irradiation.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Huan Yang,Zishuo Ni,Xian Zhang,Qun Li,Zhongnian Yang
N, S co-doped carbon coated 3D porous Mn 0.5 Ti 2 (PO 4 ) 3 was fabricated via fulvic acid pyrolysis. • The carbon layer synergistically enhances electronic conductivity and Li + diffusion kinetics. • The designed composite anode revealed outstanding rate capability. NASICON-structured Mn 0.5 Ti 2 (PO 4 ) 3 (MTP) has emerged as a competitive anode candidate for lithium-ion batteries (LIBs), benefiting from its abundant lattice vacancies, robust structural integrity, and suitable operating voltage. Nevertheless, the practical scalability is constrained by intrinsically low electronic conductivity. Herein, fulvic acid (FA) is employed as a carbon precursor to composite with MTP via high-temperature carbonization, aiming to optimize the electrochemical performance of MTP. Electrochemical tests reveal that the composite with FA/MTP weight ratio of 0.30 carbonized at 800℃ achieves enhanced cycling stability and rate capability, delivering lithiation capacities of 391.4 and 198.9 mAh g −1 at 0.1 and 1.6 A g −1 , respectively. The superior performance is attributed to the formation of uniform N, S co-doped carbon coating layer derived from in-situ carbonization of FA. N, S co-doping not only facilitates rapid electron transport and buffers volume changes during repeated lithiation/delithiation but also introduces additional active sites for lithium storage. Simultaneously, the incorporation of a co-doped carbon layer on MTP improves the binding affinity with MTP, thereby conferring outstanding structural durability and electrical conductivity of the composite. This work provides a simple and effective strategy for utilizing natural biomass derivatives to improve the electrochemical performance of polyanionic compounds for advanced LIB anodes. Download: Download high-res image (150KB) Download: Download full-size image
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiangyue Liao,Shuhan Yi,Min Xie,Xiaoying Li,Binghao Lin,Yufan Chen,Yangjie Li,Xuemei He,Qiaoji Zheng,Kwok-Ho Lam,Dunmin Lin
Na3V2(PO4)3 (NVP) is regarded as a promising cathode for sodium-ion batteries (SIBs) owing to its high operating voltage and robust NASICON-type framework. However, its practical application is hindered by poor rate capability and limited long-term cycling stability. In this work, a high-entropy substituted cathode, Na3V1.75(Ca, Zr, Al, Mn, Mg)0.25(PO4)3 (denoted as HE-NVP), is successfully synthesized via a conventional solid-state method. The introduction of multiple aliovalent cations leads to local structural regulation, where elongation of Na(1)–O bonds and contraction of Na(2)–O bonds enhance structural stability and facilitate fast Na+ migration. Simultaneously, the V4+/V5+ redox couple is activated at ∼4.0 V, significantly boosting energy density and cycling stability. High-entropy substitution also promotes pseudocapacitive behavior through the modulation of the local chemical environment and vanadium redox chemistry. As a result, HE-NVP delivers excellent rate performance with a high specific capacity of 93.2 mAh g–1 at 50 C and outstanding long-term durability, retaining 81.8% of its initial capacity after 2,000 cycles at 20 C. Even under harsh conditions of 50 C, it maintains 78% capacity retention after 4,000 cycles, with an ultralow capacity decay rate of 0.006% per cycle after 6,000 cycles. Ex-situ XRD analysis confirms a single-phase solid-solution reaction mechanism with a minimal volume change of only 1.5% during Na+ insertion/extraction. This study highlights a practical and effective strategy for designing high-performance SIB cathodes through rational high-entropy engineering of the crystallographic structure and redox chemistry.
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Materials
·
2020
·Vol. 4
·期 2
·208-212
·
IF 0
Jinhang Lv,Ruilin Zheng,Peng Lv,Wei Wei
A solid electrolyte of LAGP [Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ] contained 0.5 wt% LiF was prepared by using low-volatile raw materials. The effects of different heat treatment conditions (750–900 °C, 4–10 h) and additive (LiF) on the ionic conductivity, structural morphology, and crystal transformation process were investigated in detail. EIS (electrochemical impedance spectroscopies) showed that the ionic conductivity of LAGP contained 0.5 wt% LiF had a highest value of 3.17 × 10 −4 S cm −1 with low activation energy (0.31 eV) after treating 825 °C for 6 h, more than LAGP of 2.45 × 10 −4 S cm −1 . DSC analysis and SEM images indicated that adding a small amount of LiF to LAGP not only can lower the glass transition temperature (from 513 °C to 507 °C) and crystallization temperature (from 622 °C to 605 °C), but also can modify the grain boundary and increase the relative density of LAGP (from 95.8% to 97.7%).
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Zhihua Zhang,Shaojie Chen,Jing Yang,Gaozhan Liu,Xiayin Yao,Ping Cui,Xiaoxiong Xu
The severe instability with lithium (Li) anode of NASICON-structure Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) solid-state electrolyte (SSE) greatly hinders its practical applications in the all-solid-state lithium batteries (ASSLBs) with high energy density and safety. In order to alleviate this issue, here we employed an artificial protective layer of LAGP glass on the surface of ceramic LAGP sheet to construct a surface amorphized electrolyte via a spin-coating co-sintering method. AC impedance test and galvanostatic charge-discharge cycling of Li/electrolytes/Li symmetrical cell suggest that enabled by this glass layer, the surface amorphized LAGP can exhibit better compatibility with Li anode. In addition, with a poly(ethylene oxide) polymer electrolyte in the cathode side , at 0.1 C under 60 °C, the LiFePO 4 /Li ASSLB using surface amorphized LAGP can keep stable for 120 cycles with a retention of 93.6%, which is more than 13 times of the cell using ceramic LAGP (6.9%). The formation mechanisms of unstable interphases in LAGP/Li interface were briefly summarized, and probable reasons behind the good compatibility between and LAGP glass and Li were discussed.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态电池
·
陶瓷材料
✓ 已验证
DOI
高影响因子
Journal of Central South University
·
2022
·Vol. 29
·期 9
·2980-2990
·
IF 2.392
Wang Zhen-yu,Li Cong,Huang Ying-de,He Zhen-jiang,Yan Cheng,Mao Jing,Dai Ke-hua,Zheng Jun-chao
With increasing demand on energy density of lithium-ion battery, wide electrochemical window and safety performance are the crucial request for next generation electrolyte. Gel-electrolyte as a pioneer for electrolyte solidization development aims to solve the safety and electrochemical window problems. However, low ionic conductivity and poor physical performance prohibit its further application. Herein, a fast-ionic conductor (Li 2.64 (Sc 0.9 Ti 0.1 ) 2 (PO 4 ) 3 ) (LSTP) was added into poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) base gel-electrolyte to enhance mechanical properties and ionic conductivity. Evidences reveal that LSTP was able to weaken interforce between polymer chains, which increased the ionic conductibility and decreased interface resistance during the cycling significantly. The obtained LiFePO 4 /hybrid gel-electrolyte/Li-metal coin cell exhibited excellent rate capacity (145 mA·h/g at 1 C , 95 mA·h/g at 3 C , 28 °C) which presented a potential that can be comparable with commercialized liquid electrolyte system.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Guijia Cui,Hong Wang,Fengping Yu,Haiying Che,Xiaozhen Liao,Linsen Li,Weimin Yang,Zifeng Ma
NASICON-type Na 3 V 2 (PO 4 ) 3 is a promising electrode material for developing advanced sodium-ion batteries. Preparing Na 3 V 2 (PO 4 ) 3 with good performance by a cost-effective and large-scale method is significant for industrial applications. In this work, a porous Na 3 V 2 (PO 4 ) 3 /C cathode material with excellent electrochemical performance is successfully prepared by an agar-gel combined with freeze-drying method. The Na 3 V 2 (PO 4 ) 3 /C cathode displayed specific capacities of 113.4 mAh·g −1 , 107.0 mAh·g −1 and 87.1 mAh·g −1 at 0.1 C, 1 C and 10 C, respectively. For the first time, the 500-mAh soft-packed symmetrical sodium-ion batteries based on Na 3 V 2 (PO 4 ) 3 /C electrodes are successfully fabricated. The 500-mAh symmetrical batteries exhibit outstanding low temperature performance with a capacity retention of 83% at 0 °C owing to the rapid sodium ion migration ability and structural stability of Na 3 V 2 (PO 4 ) 3 /C. Moreover, the thermal runaway features are revealed by accelerating rate calorimetry (ARC) test for the first time. Thermal stability and safety of the symmetrical batteries are demonstrated to be better than lithium-ion batteries and some reported sodium-ion batteries. Our work makes it clear that the soft-packed symmetrical sodium ion batteries based on Na 3 V 2 (PO 4 ) 3 /C have a prospect of practical application in high safety requirement fields.
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 12
·6049-6056
·
IF 2.394
Ren Yaqi,Deng Hao,Zhao Hong,Zhou Zheng,Wei Zhaohuan
A simple and effective method was developed and used to improve the conductivity and density of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 solid–state electrolyte. The raw powders were synthesized through two different methods to expand the particle size distribution, which could improve the sintered density and the grain boundary connection of the of LATP electrolyte. Through this method, the relative density of the electrolyte made of mixed powders can reach to 97% compared with the 92% and 95% for electrolyte made of single solid-state reaction powder and sol-gel reaction powder, respectively. The conductivity test shows that this electrolyte has high total ion conductivity of 5.23 × 10 −4 S cm −1 at room temperature with the grain boundary conductivity of 6.11 × 10 −4 S cm −1 . With the merits of high density and ion conductivity, this solid-state electrolyte shows good rate capability and cycle performance in aqueous lithium-oxygen batteries.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）