CERAMICS INTERNATIONAL
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2018
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IF 3.057
Hainan Bai,Jiulin Hu,Xiaoguang Li,Yusen Duan,Feng Shao,Takahiro Kozawa,Makio Naito,Jingxian Zhang
Concerning the safety problems of conventional Li-ion batteries with liquid electrolytes, it is crucial to develop reliable solid-state electrolytes with high ionic conductivity . Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP, x = 0.3) is regarded as one of the most promising solid electrolytes due to its high ionic conductivity and excellent chemical stability to humidity. Herein, a new strategy is proposed for improving the sintering behavior and enhancing the ionic conductivity of LATP by using LiBO 2 as the sintering aid via liquid phase sintering . The as-prepared sample LATP with homogeneous microstructure and high relative density of 97.1% was successfully synthesized, yielding high total ionic conductivity of 3.5 × 10 −4 S cm −1 and low activation energy of 0.39 eV at room temperature. It was found that the addition of LiBO 2 could effectively enhance the densification and increase the ionic conductivity of LATP electrolyte, proving an effective way to synthesis LATP ceramics by a simple and reliable route.
研究领域:
材料科学
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电化学
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固态电池
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Xuan Wang,Shuo Huang,Benben Wei,Min Liu,Bo Yang,Ruoqing Liu,Hongyun Jin
All-solid-state batteries with oxide electrolytes and high-nickel layered oxide cathodes (LiNixCoyMnzO2 and LiNixCoyAlzO2, x + y + z = 1, x ≥ 60%) have received widespread attention owing to their high energy density and high safety. However, they generally suffer from interfacial structural instability when coupled with solid-state electrolytes, which strongly diminishes the longevity of the battery. In this work, we propose adding a sacrificial additive C60 to the catholyte buffer layer between Li1.4Al0.4Ti1.6(PO4)3 (LATP) and LiNi0.8Co0.1Mn0.1O2 (NCM811) to enhance the electrochemical stability under high-voltage operating conditions. A uniform and robust cathode–electrolyte interphase (CEI) film enriched with LixPOyFz, LiPxFy, and C60Fn is spontaneously formed on the surface of the cathode particles. In addition, the NCM811/Li solid-state battery delivers a discharge capacity of 150.3 mAh g–1 with a retention of 85% after 200 charge–discharge cycles at 0.5 C. This study offers a practical approach toward realizing LATP-based all-solid-state high-voltage batteries characterized by exceptional cycling stability.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Lifan Wang,Danya Gong,Siheng Niu,Leiying Wang,Qinling Shi,Xindong Wang,Jinli Qiao,Guicheng Liu,Chun Zhan
Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP)-based all-solid-state lithium battery (ASSLB) assembled with Ni-rich layered cathode (NCM), of much interest because of its high energy–density and safety, presents many challenges, one of which is poor interfacial instability resulting in large interfacial resistance. Nevertheless, the mechanism of electrochemical side reactions on the interfacial deterioration hasn’t been much investigated specifically, despite their close relationships in electrochemical performance. Herein, we report that the fundamental origin of interfacial chemical reactions is the migration of Ni 2+ from the nickel-rich cathodes to the NCM/LATP interface, for the first time, and the simultaneous chemical reaction with Ti 4+ in LATP, followed by the decomposition of LATP. In view of this, an elaborately designed regulation strategy, in-situ construction of the layered perovskite La 4 NiLiO 8 buffer layer , is proposed to effectively reduce the content of Ni 2+ on the surface of the nickel-rich cathodes and alleviate the chemical reaction between Ni 2+ and Ti 4+ , thereby improving the interfacial stability between NCM and LATP. As a result, the assembled ASSLBs with the La 4 NiLiO 8 buffer layer exhibit high initial discharge capacity (171.49 mAh/g) and excellent cycling performance with 89.47 % capacity retention after 100 cycles at 0.1C.
研究领域:
材料科学
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电化学
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能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Szu-Chi Chao,Yen-Shen Kuo,Pei-Xuan Chen,Yi‐Hung Liu
To enhance energy density and secure the safety of lithium-ion batteries, developing solid-state electrolytes is a promising strategy. In this study, a composite solid-state electrolyte (CSE) composed of poly(vinylidene difluoride) (PVDF)/cellulose acetate (CA) matrix, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt, and Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) fillers is developed via a facile solution-casting method. The PVDF/CA ratio, LiTFSI, and LATP fractions affect the crystallinity, structural porosity, and thermal and electrochemical stability of the PVDF/CA/LATP CSE. The optimized CSE (4P1C-40LT/20F) presents a high ionic conductivity of 4.9 × 10 -4 S cm −1 and a wide electrochemical window up to 5.0 V vs. Li/Li + . A lithium iron phosphate-based cell containing the CSE delivers a high discharge capacity of over 160 mAh g −1 at 25 °C, outperforming its counterpart containing PVDF/CA polymer electrolyte. It also exhibits satisfactory cycling stability at 1C with approximately 90 % capacity retention at the 200th cycle. Additionally, its rate performance is promising, demonstrating a capacity retention of approximately 80 % under varied rates (2C/0.1C). The increased amorphous region, Li + transportation pathways, and Li + concentration of the 4P1C-40LT/20F CSE membrane facilitate Li + migration within the CSE, thus improving the battery performance.
研究领域:
材料科学
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电化学
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储能技术
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高分子科学
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固态离子学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2021
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IF 4.158
Zehua Cai,Rengui Xiao,Bo Jiang
Sodium superionic conductor (NASICON)-type conducting ceramic Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP) has been regarded as one of the most promising candidates for high-safety and high-energy density solid-state Li metal batteries (SSLMBs) because of its high ionic conductivity and good chemical stability. However, the large interfacial impedance and instability between the solid electrode and LATP electrolyte severely hinder its practical application in solid-state batteries. To overcome this technical challenge, we demonstrate a polymer–ceramic–polymer composite electrolytes (PCPCEs) prepared through drop casting, which ameliorates the interfacial stability between the solid electrolyte and the electrode. PCPCEs with an ideal ambient-temperature ionic conductivity can drastically reduce the interfacial resistance between the LATP and solid electrodes and effectively avoid a direct reaction and contact between them. As a result, the interfacial impedance decreases from 30,000 to 280 Ω for the Li–LATP interfaces and from 40,000 to 800 Ω for the LATP–LiFePO 4 (LFP) interfaces. Meanwhile, the polarization voltage of the Li||PCPCEs||Li symmetric cell reduces from 1.5 V to 100 mV. The solid-state Li metal batteries assembled with a Li metal anode , LFP cathode, and PCPCEs exhibit a desired initial discharge capacity of 152.5 mAh g −1 and a good cycling performance at 0.1 C for 25 °C. This study provides a prospective insight to improve the poor interface between the solid electrode and inorganic conducting ceramic.
研究领域:
材料科学
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电化学
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电池技术
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固态电解质
✓ 已验证
DOI
高影响因子
Energy Storage Materials
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2023
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IF 20.4
Xiaoyu Zhang,Jinhuan Wang,Dongqi Hu,Wei Du,Chuanxin Hou,Huiyu Jiang,Yuting Wei,Xiao Liu,Fuyi Jiang,Jianchao Sun,Hua Yuan,Xiaoyu Huang
The large scale application of solid state lithium metal batteries based on NASICON-type Li 1+x Al x Ti 2-x (PO 4 ) 3 (LATP) electrolyte has been hindered by insufficient ion conductivity and interface instability due to the spontaneous Ti 4+ reduction reaction between Li metal and LATP. To address these issues, Li 1.7 Al 0.3-x Bi x Ti 1.7 (PO 4 ) 3 (0 ≤ x ≤ 0.03) (LABTP) electrolytes were prepared, and the influence of Bi substitution on the microstructure and conductivity of LATP were investigated. Suitable amount of Bi substitution accelerates densification and improves the ionic conductivity . Furthermore, unlike commonly used polyethylene oxide (PEO) and polyvinylidene difluoride (PVDF), polyvinylbutyral (PVB)-based quasi-solid electrolytes with LABTP is first-time proposed to improve the compatibility and stability of the LATP/Li interface. The synergistic effect of Bi doping and PVB reduces the reduction reaction of Ti 4+ . Small voltage hysteresis is observed in the corresponding Li||Li symmetric cells. The solid-state Li|LABTP@PVB|LiFePO 4 full cell can deliver a high capacity of 146.2 mAh g −1 and a stable cycling performance without reduction after 200 cycles.
研究领域:
材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）