JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Biyi Xu,Wenlong Li,Huanan Duan,Haojing Wang,Yiping Guo,Hua Li,Hezhou Liu
This paper proposes a strategy to stabilize the garnet/Li interface by introducing Li 3 PO 4 as an additive in garnet-type Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 . The Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 electrolyte exhibits a room-temperature Li-ion conductivity of 1.4 × 10 −4 S cm −1 , which is less than that of the Li 3 PO 4 -free counterparts (4.6 × 10 −4 S cm −1 ). However, the presence of Li 3 PO 4 improves the interfacial compatibility and suppresses Li-dendrite formation during Li-metal plating/stripping. The symmetric Li/garnet/Li cells with Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 have been successfully cycled at a current density of 0.1 mA cm −2 at 60 °C for 60 h; on contrast, the control cells with Li 3 PO 4 -free Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 display noisy potential with large voltage polarization and get short-circuited completely after 33-h cycling under the same operating condition. The outstanding interface stability can be attributed to the in situ reaction of the Li flux with Li 3 PO 4 to form a self-limiting and ion-conducting interphase, Li 3 P, which is confirmed experimentally.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
IONICS
·
2022
·Vol. 29
·期 3
·1003-1011
·
IF 2.961
Jiang Guanghui,Liu Lei,Fei Zitong,Meng Qi,Zhang Yingjie,Dong Peng,Ouyang Quansheng,Ke Ding,Wang Jiqun,Yang Anqi
The large-scale lithium-ion batteries (LIBs) have begun to retire, and their disposal and reuse is a challenge. Herein, a regenerative and coating synergistic strategy is adopted to achieve the Li 3 PO 4 -coated and regeneration of LiNi 0.5 Co 0.2 Mn 0.3 O 2 material. The temperature was confirmed great influence to regenerate. The sample of 850 °C has the best cycle performance and rate performance, and the capacity retention rate is more than 80% after 100 cycles at 1 C. The recovery of material properties is due to structural repair and Li 3 PO 4 coating. The coating and regeneration strategy can be applied to the regeneration of other cathode materials and provides guidance for the treatment and reuse of waste LIBs electrolyte.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Battery Energy
·
2025
·
IF 9.9
Jun Ma,Ruilin He,Yidong Jiang,Ludan Zhang,Hongli Xu,Hongbo Zeng,Chaoyang Wang,Xiaoxiong Xu,Yonghong Deng,Jun Wang,Shang-Sen Chi
Solid-state electrolyte (SSE) is a potential way to solve the safety problems of lithium metal batteries (LMBs), and Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZTO) is one of the most extensive research SSEs due to its good air stability and wide electrochemical window. However, the residual alkali on LLZTO surface limits its application with polyvinylidene difluoride (PVDF)-contained binders, and the uncontrollable lithium dendrites growing between the grain boundaries of LLZTO particles would lead to rapid capacity fading and potential short circuit risk. Herein, by in situ coating Li 3 PO 4 (LPO) on LLZTO particles (LLZTO@LPO) evenly, the residual alkali on the LLZTO surface is neutralized and the pH value is reduced to 8.84. The modified LLZTO can be mixed with PVDF solution and shows good fluidity without a cross-linking reaction, making the subsequent ceramic coating on the separator feasible. The LLZTO@LPO coating polyethylene (PE) separator can achieve 1400 h (115% increase) stable cycling under 1 mA cm −2 current density in the Li∥Li symmetrical cell and 80% capacity retention after 260 cycles (NCM622-Li coin cell with 3 mAh cm −2 loading). Furthermore, the LLZTO SSE pellets were prepared with the LLZTO@LPO and assembled in coin cell. The critical current density (CCD) result increases from 0.7 to 1.6 mA cm −2 owing to that the LPO coating effectively inhibits the lithium dendrites formation through LLZTO grain boundaries. This work provides a strategy for fabricating the coating layer on LLZTO to improve the stability of LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
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.
研究领域:
材料科学
·
电子材料
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 13
·2101955
·
IF 6.389
Anping Tang,Ziqin Liang,Hezhang Chen,Guorong Xu,Haishen Song
A new type of cathodic active material for lithium-ion batteries based on a composite of Li 3 PO 4 and V 2 O 3 is proposed in this work. Although the V 2 O 3 component is almost inactive in the voltage range of 2–4.5 V versus Li + /Li, the mixture of the two components can deliver a larger reversible specific capacity of ≈190 mA h g −1 in the voltage range of 2–4.5 V at a current density of 15 mA g −1 . X-ray photoelectron spectroscopy data and cyclic voltammetry data suggest that the vanadium ions are probably oxidized and reduced repetitively upon cycling and that the V 3+ ions are partially oxidized to V 4+ and even V 5+ ions during charging to 4.5 V. This distinctive lithium-ion uptake and release phenomenon, in which Li 3 PO 4 functions as a lithium source of surface conversion reaction, will introduce a new path for designing unique cathodic active materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiaotong Liu,Qiang Weng,Tao Liu,Zhiyuan Tang,Haoqing Tang
Li 2 ZnTi 3 O 8 (LZTO) has been highlighted as a promising active anode material for rechargeable lithium-ion batteries, but it suffers from a low high-rate capacity due to the sluggish Li-ion diffusion kinetics and inevitable consumption of Li + due to side reactions at the electrode/electrolyte interface. In this study, using Li 3 PO 4 as a lithium ion conductor and interface modifier, the crystal structure and electrochemical properties of LZTO are systematically studied and confirm that it is a faster lithium ion conductivity. Li 3 PO 4 not only accelerates Li-ion transport and increases diffusion paths, but also exhibits interfacial stability at high temperatures. Due to these advantages, the LZTO electrode containing the Li 3 PO 4 coating layer exhibits significantly improved electrochemical performance. The new Li 3 PO 4 coated LZTO electrode shows a large discharge specific capacity of 158.9 mAh g − 1 and a high capacity retention of 99% is obtained after 200 cycles at a rate of 5.0 A g − 1 and combined with cycle stability. Furthermore, the Li 3 PO 4 coated LZTO electrode also exhibits excellent low electrode polarization and high temperature long cycling performance for 500 cycles at temperatures up to 70 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Hao Chen,Li Xiao,Han Chen,Yirong Zhu,Kaixiong Xiang,Haiyang Liao
Residual Li on surface of spherical particles of LiNi 0·5 Co 0·2 Mn 0·3 O 2 (NCM523) was used to synthesise the core-shell structure of Li 3 PO 4 @ NCM523 for enhancing structural stability and long-cycle life. The optimal mass ratio (Li 3 PO 4 :NCM523) was found to be 0.5 wt% (LPO-0.5), and the thickness of Li 3 PO 4 on the surface of LPO-0.5 was approximately 12 nm. Compared with the pristine NCM523, the Li 3 PO 4 @ NCM523 cathode material not only has a longer cycle life, but also exhibits better structural stability. The Li 3 PO 4 layer inhibits the electrolyte from eroding the NCM523 cathode material and prevents the volume loss of the active microsphere during cycling. Furthermore, the core-shell structure of material observed via scanning electron microscopy was well maintained after 200 cycles. These results verify that the core-shell structure of material contributes to the improvement of Ni-based cathode structural stability and that the simple process favours the industrial application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
Huanhuan Guo,Guangmei Hou,Jianguang Guo,Xiaohua Ren,Xiaoxin Ma,Linna Dai,Shirui Guo,Jun Lou,Jinkui Feng,Lin Zhang,Pengchao Si,Lijie Ci
Lithium–oxygen batteries (LOBs) have attracted increasing interest because of their superior theoretical specific energy. However, the stability of lithium metal anode is one of the obstacles limiting their practical applications. Here, we introduce an artificial Li3PO4 solid electrolyte interphase (SEI) film to protect the lithium anode in LOB with LiI/LiNO3/DMSO (dimethyl sulfoxide) electrolyte. The Li3PO4-protected Li anode exhibits excellent electrochemical stability during the Li stripping/plating process and leads to a relatively uniform and featureless surface in LOB after cycling. Our research demonstrates that superior electrochemical performance can be achieved in the Li–O2 battery with the synergistic combination of the DMSO-based electrolyte, the LiI redox mediator, and the Li3PO4-protected Li anode. The LOB with a Li3PO4-protected Li anode exhibits a prolonged cycling life span of 152 cycles with a fixed capacity of 1000 mA h g–1 at 2 A g–1. The results in this work provide knowledge for the development of a robust strategy for protecting the Li anode in the applications of Li–O2 batteries.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
Advanced Sustainable Systems
·
2023
·
IF 7.1
Xincan Cai,Wenda Bao,Lianqi Zhao,Yuqing Zuo,Haojie Zhao,Longxing Su,Yue Zhang,Hui Zhang,Jin Xie
In lithium batteries, the interface between electrolytes and electrodes with optimized structural stability and fast charge transfer kinetics plays a pivotal role in achieving overall cycle and rate performance. Introducing a uniform interfacial layer that conducts Li + ions while insulating electrons, through atomic layer deposition (ALD) of lithium compounds, has shown promise in facilitating lithium ion transport and enhancing interface stability. However, synthesizing lithium compounds with both robust chemical stability and a broad electrochemical window using ALD poses challenges due to the difficulty of obtaining desired products under specific ALD reaction conditions. In this study, this challenge by investigating Li 3 PO 4 is addressed, a compound grown by ALD that exhibits a noteworthy property: the in situ formation of a more stable LiPO 3 phase under high applied voltage. The LiPO 3 phase possesses an extended theoretical stability window (LiPO 3 : 2.48-5.00 V versus Li 3 PO 4 : 0.69-4.21 V), and its emergence substantially enhances the electrochemical performance of all-solid-state lithium batteries based on polyethylene oxide (PEO). This work not only presents experimental evidence of the in situ transformation of the interfacial layer but also offers a pragmatic approach to realizing all-solid-state lithium batteries with elevated energy density, emphasizing safety and stability considerations.
研究领域:
材料科学
·
电化学
·
电池技术
·
固态电解质
✓ 已验证
DOI
高影响因子
ELECTROCHEMISTRY
·
2021
·Vol. 89
·期 5
·461-466
·
IF 1.381
Zunzhi WANG,Shengxian SHE,Mengyao LV,Xujun YUAN,Hui SUN,Jun ZHAO,Jian YU,Xufeng YAN
The properties exhibited by Ni-rich cathode materials were enhanced through the mixed coating layers of Li3PO4 and boric acid. The scanning electron microscopy (SEM), the transmission electron microscope (TEM), the differential scanning calorimetry (DSC), the Electrochemical Impedance Spectroscopy (EIS), as well as the half-cell and full-cell charge-discharge tests were adopted for characterizing the structure and electrochemical properties exhibited by the cathode materials. As revealed by results, the Li3PO4 and boric mixed coating layers can effectively reduce the surface area and protect the direct contact between cathode material particle surface and electrolyte, meanwhile improving the structural stability and cycle performance. The coating of fast ionic conductor contributes to enhance the specific capacity possessed by the Ni-rich cathode materials accordingly.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Qinwen Deng,Teng Li,Jun Wang,Shu Zhang,Hongcheng Yang,Caili Xu,Mengqiang Wu
Doping and particle size controlling are two important approaches to improve the electrochemical performance of LiMn x Fe 1−x PO 4 cathode materials . By employing a straightforward hydrothermal method and utilizing cost-effective lithium phosphate (Li 3 PO 4 ) as the precursor, we successfully synthesized high Mn-content LiMn 0.79 Fe 0.2 Mg 0.01 PO 4 /C composites. The results reveal that the minute amount of Mg substantially enhances the electrochemical performance. In the subsequent mechanism study using Li 3 PO 4 precursors with different particle size, we found that the nucleation process, dependent on specific surface area and diffusion rate, is likely to play a critical role for the size and morphology of formed LiMn 0.79 Fe 0.2 Mg 0.01 PO 4 . LiMn 0.79 Fe 0.2 Mg 0.01 PO 4 /C (LMFP-1), synthesized from initially smaller-sized and less agglomerated Li 3 PO 4 (LPO-1), exhibited the most diminutive average particle size coupled with the highest specific surface area, which further facilitated electrolyte interfacial interaction and promoted Li + diffusion kinetics. At 1C, LMFP-1 displayed a specific capacity of 110.7 mAh g −1 , with 97.07% capacity retention after 200 cycles. This study provides pivotal insights for the synthesis of high-performance LiMn x Fe 1−x PO 4 materials.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2025
·Vol. 41
·期 2
·333-342
·
IF 3
Lin Huahui,Shen Yu,Wei Li,Song Ran,Wu Fan,Wei Peng,Yang Zhenzhong,Ren Yurong,Qu Ke,Ding Zhengping
Ultra-high nickel layered cathodes (Ni⩾95%) have emerged as prospective candidates for next-generation lithium-ion batteries (LIBs) due to their exceptional specific capacity and cost-effectiveness. However, the commercial application of these cathodes has been hindered by several challenges, including structural instability during cycling, high sensitivity to air, and slow Li + migration. In this research, a one-step modification strategy was developed to simultaneously achieve Mg doping and Li 3 PO 4 layer coating for the ultra-high nickel cathodes. Characterization results demonstrated that Mg doping not only alleviates lattice strain changes during the H2–H3 phase transition (H2: the second hexagonal phase; H3: the third hexagonal phase) but also serves as a structural anchor, preventing Ni 2+ migration and occupation within the Li layer. The Li 3 PO 4 surface coating layer acts as an electrochemical shield, protecting against interfacial side reactions and enhancing the Li + diffusion rate. As a result, the LiNi 0.95 Mn 0.05 O 2 cathode, with both internal and external modifications, demonstrates significant improvement in cycling stability (85.7% capacity retention after 100 cycles) and Li + transport performance (130.6 mA·h·g −1 at 10 C, 1 C=189.6 mA·h·g −1 ), providing a solid foundation for the further development and application of ultra-high nickel cathodes.
研究领域:
材料科学
·
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）