CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Zixiang Guo,Xue Qin,Yulong Xie,Chanrong Lei,Tianyu Wei,Yuzhe Zhang
Nanoparticle LiTi 2 (PO 4 ) 3 was prepared by solvothermal and calcination methods. LiTi 2 (PO 4 ) 3 -xh(x = 5, 7, 9, 13) was successfully synthesized under different calcination times in nitrogen atmosphere, and LiTi 2 (PO 4 ) 3 –7h showed excellent rate and electrochemical performance. It delivered discharge capacities of 141.2, 119.9, 109.8, 98.2, 87.3, and 76.7 mAh·g −1 at rates of 0.5, 1, 2, 5, 10, and 20C, respectively. In particular, its initial discharge capacity can reach 123.3 mAh·g −1 at the high rate of 10C. Hence, these superior properties demonstrate that LiTi 2 (PO 4 ) 3 –7h has great application advantages as a cathode 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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yiting Liao,Lanzhen Peng,Xiaosong Zhou,Jin Luo,Limei Xu,Xiaomei Ning,Xiaoqin Zhou,Xunfu Zhou,Yueping Fang
Two major challenges in photocatalysis are the separation and utilization of photogenerated charge carriers that have limited their wider applications. To address these issues, significant studies have been devoted to the surface modification of photocatalysts. Herein, CdS nanorods were surface-modified by an ion-conducting LiTi 2 (PO 4 ) 3 (LTP) shell. This modification could accelerate the rapid separation and efficient utilization of photoinduced charge carriers. Therefore, CdS@LTP composite photocatalyst displayed a photocatalytic H 2 evolution rate of 26.01 mmol g −1 h −1 without any addition of cocatalysts in a Na 2 S/Na 2 SO 3 solution, which was over 6-fold compared to CdS, and showed improved stability. Furthermore, this shell can prevent the reverse reactions between H 2 and O 2 during photocatalytic water splitting. With the photo-deposition of Pt cocatalysts, CdS@LTP-Pt can achieve efficient overall water splitting with the highest H 2 generation rate (351 μmol g −1 h −1 ), which is 3.25 times higher than that of CdS-Pt. This study broadens the application of ionic conductor materials and provides a new way for the design of advanced photocatalysts for solar energy conversion.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2017
·
IF 2.354
Zhi Zhou,Yiran Li,Mao Xia,Nan Zhou
In this paper, Li 1–x Ti 2 (PO 4 ) 3 /C composites (x = 0, 0.03, 0.05, 0.07) were synthesized by sol-gel approach, and the influence of Li vacancy on electrochemical performance of LiTi 2 (PO 4 ) 3 /C anode for aqueous rechargeable lithium battery was studied. Li vacancy hardly influences the crystal structure and morphology of the composite. Electrochemical measurement results demonstrated that Li 1–x Ti 2 (PO 4 ) 3 /C exhibited better performance compared with pristine LiTi 2 (PO 4 ) 3 /C, and Li 0.95 Ti 2 (PO 4 ) 3 /C has the best properties. Li 0.95 Ti 2 (PO 4 ) 3 /C delivered the discharge capacity of 104.3, 92.6, and 71.8 mAh g − 1 at 0.2, 5, and 20 C (1 C = 150 mA g − 1 ), 4.1, 27.3, and 34.4 mAh g − 1 larger than that of Li 0.95 Ti 2 (PO 4 ) 3 /C at corresponding rates, respectively. After 1000 cycles at 5 C, the discharge capacity retention for Li 0.95 Ti 2 (PO 4 ) 3 /C can reach 75.3%, 15.4% larger than that for LiTi 2 (PO 4 ) 3 /C. Our study reveals that Li vacancy is an efficient method to enhance the electrochemical properties of LiTi 2 (PO 4 ) 3 -based materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Zhangxing He,Yingqiao Jiang,Jing Zhu,Yuehua Li,Zhen Jiang,Huizhu Zhou,Wei Meng,Ling Wang,Lei Dai
In this paper, LiTi 2-x Sn x (PO 4 ) 3 /C (x = 0, 0.2, 0.3, 0.4) composites were synthesized by sol-gel approach, and were investigated as anodes for aqueous lithium ion battery . Sn doping with proper content has no obvious influence on phase and morphology of the composite, while excessive dosage of Sn can affect its crystal structure. Sn doping can enhance the electrochemical properties of LiTi 2 (PO 4 ) 3 /C (LC). Among LiTi 2-x Sn x (PO 4 ) 3 /C composites, LiTi 1.7 Sn 0.3 (PO 4 ) 3 /C (LC-Sn-0.3) demonstrates the best electrochemical properties. Most importantly, the rate performance of LC can be improved dramatically by Sn doping on Ti sites. LC-Sn-0.3 delivers a discharge capacity of 118.9, 115.3, and 104.2 mAh g −1 at 0.2, 6, and 20 C (1 C = 150 mA g −1 ), respectively, with significant increase of 15.2, 27.4, and 41.9 mAh g −1 compare with LC. In addition, LC-Sn-0.3 exhibits superior cycling performance. The capacity retention for LC-Sn-0.3 can keep 76.8% after 1000 cycles at relatively high rate of 10 C, while only 51.7% of initial discharge capacity is retained for LC. Our study reveals that Sn doping on Ti sites is an efficient and facile method to improve the performance of LiTi 2 (PO 4 ) 3 /C composite for aqueous lithium ion battery.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Zhangxing He,Yingqiao Jiang,Jing Zhu,Haiyan Wang,Yuehua Li,Huizhu Zhou,Wei Meng,Lei Dai,Ling Wang
N-doped carbon coated LiTi 2 (PO 4 ) 3 composites were synthesized by polyaniline (PANi) as carbon and nitrogen bi-sources, and used as anode for aqueous lithium ion battery (ALIB). High-quality N-doped carbon layers were achieved to modify LiTi 2 (PO 4 ) 3 crystal. ALIB using as-synthesized LiTi 2 (PO 4 ) 3 @C-N as anode exhibited superior rate performance. It delivered discharge capacities of 122.4, 105.8, and 95.3 mAh g −1 at rates of 0.2, 10, and 20C, respectively, much higher than those (97.4, 61.1, and 43.9 mAh g −1 ) of LiTi 2 (PO 4 ) 3 /C using sucrose as carbon source. Furthermore, LiTi 2 (PO 4 ) 3 @C-N anode demonstrated outstanding cycling performance with a capacity retention of 82.1% after 1000 cycles at 2C, while only 56.3% of capacity retention was kept for that using sucrose as carbon source. The excellent electrochemical performances of LiTi 2 (PO 4 ) 3 @C-N are mainly attributed to good dispersion, proper carbon layer, and nitrogen doping, further accelerating the charge transfer and diffusion of Li ions/electrons.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lu Sai,Zhongsheng Dai,Zhenbo Wang,Huiling Zhao,Ying Bai
Li-rich layered oxides with high energy densities have become one kind of promising cathode for advanced lithium-ion batteries, however some issues are severely hindering their practical applications. To address these challenges, fast ion conductive LiTi 2 (PO 4 ) 3 (LTPO) is employed to modify the typical Li-rich cathode Li 1 · 2 Mn 0 · 56 Ni 0 · 17 Co 0 · 07 O 2 (LMNCO) via a sol-gel process combined with a two-step annealing treatment in this work. Serving as a physical separator, LTPO coating effectively depresses the side reactions at cathode-electrolyte interface and the transition-metal dissolution from LMNCO active material under harsh electrochemical environment. Meanwhile, LTPO layer with high ion conductivity could facilitate the interfacial Li + diffusion during charge/discharge process. In addition, partial Ti 4+ ions doped into LMNCO effectively elevate the oxygen electronegativity and restrain the excessive oxidization of lattice oxygen, thus stabilizing the crystal structure and alleviating the stress-strain propagation upon cycling. Electrochemical characterization results demonstrate that the LTPO-modified LMNCO cathode exhibits a superior capacity retention of 86.5 % after 400 cycles at room temperature and that of 73.7 % even under an elevated temperature of 45 °C after 250 cycles under 1C. This study provides a facile strategy for the surface modification of Li-rich layered-structure oxides, which also sheds light in enhancing electrochemical performances for various cathode materials .
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Xuejia Luo,Mengyao Wang,Yuting Xie,Zhiqiang Wang,Qingshan Xie,Fanghui Lou,Guan Wang,Huming Hao,Liangxuan Yang,Guixin Wang
Severe deformation, thermal runaway, and low ionic migration do harm to the applications of silicon. Herein, a negative thermal expansion material of LiTi2(PO4)3 (LTP) with high ionic conductivity was synthesized and utilized to modify nanoscaled Si, and its effects were investigated. Si modified with 3 wt % LTP (SL3) shows the best performance, and its discharge capacities retain 849.4 and 410.9 mAh/g after 100 cycles at 2 A/g as temperatures are 25 and 60 °C, respectively, about 245.4 and 399.9% higher than those of Si. At 60 °C, the diffusion coefficient of lithium ions in Si is increased by 26 times, while the voltage difference between the main redox peaks, charge transfer resistance, and strain of the SL3 are 0.43 V, 171.4 Ω/cm2, and 211 με, respectively, around 15.7, 94.8, and 45.3 lower than those of the Si. The released heat of SL3 is declined to 175.4 J/g, about 85.9% that of the Si. The improvement mechanism of Si by LTP is discussed. It provides a path for enhancing the performance and safety of materials by decreasing heat and deformation hazards, improving the interface, and intensifying transfer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Zhangxing He,Yingqiao Jiang,Wei Meng,Jing Zhu,Yang Liu,Lei Dai,Ling Wang
In this paper, LiTi 2 (PO 4 ) 3 @N-doped carbon anode has been synthesized by in situ carbon coating approach. The well-proportioned N-doped carbon layer and loose nanoporous structure was obtained by using urea as nitrogen source and pore former. LiTi 2 (PO 4 ) 3 @N-doped carbon as anode demonstrates much better rate capability than LiTi 2 (PO 4 ) 3 @carbon in ALIBs. The optimized anode delivers the discharge capacity of 93.7 mAh g −1 and 74.2 mAh g −1 at rates of 10C and 20C, 22.5 mAh g −1 and 50.0 mAh g −1 larger than that of LiTi 2 (PO 4 ) 3 @carbon. Moreover, LiTi 2 (PO 4 ) 3 @N-doped carbon exhibits excellent cycling performance with capacity retention of 84.3% at 5C after 1000 cycles. As verified, the well-proportioned N-doped carbon layer could reduce charge transfer resistance and improve electrical conductivity. The loose nanoporous structure could shorten pathway and facilitate diffusion for Li ion. Therefore, LiTi 2 (PO 4 ) 3 @N-doped carbon gets the superior electrochemical properties benefiting from those two characteristics.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 43
·期 1
·99-105
·
IF 2.758
Zhi Zhou,Wei Luo,Hao Huang,Shengxiong Huang,Yongji Xia,Nan Zhou,Zhangxing He
In this paper, LiTi 2 (PO 4 ) 3 @carbon/graphene (LCG) hybrid was prepared and investigated as anode for aqueous lithium ion batteries (ALIBs). The as-prepared hybrid was characterized by XRD , SEM, TEM and TGA . The electrochemical performances of nano-structured materials as anode were evaluated by cyclic voltammetry , electrochemical impedance spectroscopy and charge-discharge tests. The cell using LCG as anode exhibits excellent cycling performance both at relatively low and high rates. The capacity retention of LCG can remain 87.6% at 0.2 C after 200 cycles and 77.2% at 5 C after 1000 cycles compared with LiTi 2 (PO 4 ) 3 @carbon (0.2 C: 71.8%, 5 C: 58.1%). Moreover, LCG reveals superior rate capability with 80.8 mA h g −1 , 62.1 mA h g −1 at 10 C and 20 C, respectively. The outstanding electrochemical performance of LCG comes from the improved electrical conductivity and the forming of efficient conductive network. The results demonstrate that the graphene-modified LiTi 2 (PO 4 ) 3 @carbon is a promising anode for ALIBs.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 12
·9327-9333
·
IF 2.986
Nan Zhou,Shengxiong Huang,Tao Hong,Wei Luo,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, LiTi 2 (PO 4 ) 3 @carbon composite as anode for aqueous lithium ion battery has been successfully synthesized by in-situ carbon coating method using oxalic acid and glucose as double carbon sources. XRD results confirm the rhombohedral NASICON-type LiTi 2 (PO 4 ) 3 structure of the as-prepared composite. The LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources (LTP-OG-10) disperses well, and the coated carbon layer has the appropriate thickness of 3–7 nm, which result in proper balance of the good electrical conductivity and the fast kinetics of diffusion of lithium ions . LTP-OG-10 exhibits better electrochemical performance compared with those using oxalic acid (LTP-O) or glucose (LTP-G) single carbon source. LTP-OG-10 anode delivers the discharge capacity of 112.5 mA h g −1 , 96.8 mA h g −1 , and 54.2 mA h g −1 at 0.2 C, 5 C and 20 C, respectively, much larger than that of LTP-O and LTP-G. Moreover, LTP-OG-10 demonstrated excellent cycling performance, with the capacity retention of 71.1% after 400 cycles at 0.2 C, 22.9% higher than that of LTP-G. The good electrochemical properties of LTP-OG-10 is mainly ascribed to the increase of defects, high-quality and appropriate thickness of carbon layer. Our study reveals that preparing LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources is an efficient approach to enhance its electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
IONICS
·
2016
·Vol. 23
·期 3
·575-583
·
IF 2.119
He Zhangxing,Jiang Yifan,Sun Dan,Dai Lei,Wang Haiyan
Inferior rate capability is a big challenge for LiTi 2 (PO 4 ) 3 anode for aqueous lithium-ion batteries. Herein, to address such issue, we synthesized a high-performance LiTi 2 (PO 4 ) 3 /carbon/carbon nanotube (LTP/C/CNT) composite by virtue of high-quality carbon coating and incorporation of good conductive network. The as-prepared LTP/C/CNT composite exhibits excellent rate performance with discharge capacity of 80.1 and 59.1 mAh g −1 at 10 C and 20 C (based on the mass of anode, 1 C = 150 mA g −1 ), much larger than that of the LTP/C composite (53.4 mAh g −1 at 10 C, and 31.7 mAh g −1 at 20 C). LTP/C/CNT also demonstrates outstanding cycling stability with capacity retention of 83.3 % after 1000 cycles at 5 C, superior to LTP/C without incorporation of CNTs (60.1 %). As verified, the excellent electrochemical performance of the LTP/C/CNT composite is attributed to the enhanced electrical conductivity, rapid charge transfer, and Li-ion diffusion because of the incorporation of CNTs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 27
·13950-13956
·
IF 8.867
Yanan Xu,Chang Xu,Qinyou An,Qiulong Wei,Jinzhi Sheng,Fangyu Xiong,Cunyuan Pei,Liqiang Mai
Novel NASICON-type carbon-coated LiTi2(PO4)3 microflowers (LTP-F/C) as a hybrid magnesium–lithium-ion battery (MLIB) cathode is presented for the first time. Benefiting from the synergistic effect of the NASICON structure, nanosheet-constructed hierarchical architecture, and uniform carbon coating of LTP-F/C, this hybrid MLIB exhibits extraordinary electrochemical performance: ultra-high cycling stability (capacity retention of 80% after 3000 cycles at 10 C) and outstanding rate capability (94 mA h g−1 at 20 C) under a high discharge voltage plateau of ∼1.71 V (vs. Mg/Mg2+). This hybrid battery system design is highly promising for large-scale energy storage applications.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）