Ce and F Dual-Doping Strategy for High Cycle Performance of Lithium-Rich Layered Oxide Materials

NANO ◽  
2021 ◽  
Author(s):  
Jianlong Xie ◽  
Yan Qian ◽  
Jidong Duan ◽  
Jing Li ◽  
Haiyang Ding
Keyword(s):  
Cathode Materials ◽  
Retention Rate ◽  
Specific Capacity ◽  
Discharge Voltage ◽  
Cycle Performance ◽  
Cycle Stability ◽  
Layered Oxides ◽  
High Specific Capacity ◽  
Voltage Decay ◽  
New Ideas

Li-rich layered oxides (LrLOs) attracted much attention due to their high specific capacity. However, LrLOs have disadvantages such as fast voltage decay and poor cycle stability. In this work, we propose a dual-doping strategy based on Ce and F ions to respond to the defects of LrLOs. This work shows that Ce and F have a strong synergistic effect in LrLOs cathode materials. Dual-doping makes the structure of the cathode materials more stable, which is mainly manifested by inhibiting the extraction of lattice oxygen, reducing the migration of cations during the cycle, and reducing the corrosion of the electrolyte to the cathode materials. Thereby, the work improves the cycle performance of the cathode materials. The capacity retention rate is 84.3% for 200 cycles at 1[Formula: see text]C (versus 59.6%). The median discharge voltage is 3.2155[Formula: see text]V after 200 cycles at 1[Formula: see text]C (versus 2.9485[Formula: see text]V). The voltage decay is 0.4706[Formula: see text]V for 200 cycles at 1[Formula: see text]C (versus 0.6923[Formula: see text]V). Interestingly, our research found that Ni[Formula: see text] of the Li layer also plays an important role in the process of improving cycle performance. This work provides new ideas for solving the cycle stability of LrLOs cathode materials and suppressing voltage decay.

High-quality Prussian blue crystals as superior cathode materials for room-temperature sodium-ion batteries

2014 ◽  
Vol 7 (5) ◽  
pp. 1643-1647 ◽  
Author(s):  
Ya You ◽  
Xing-Long Wu ◽  
Ya-Xia Yin ◽  
Yu-Guo Guo
Keyword(s):  
Prussian Blue ◽  
Water Content ◽  
Cathode Materials ◽  
Room Temperature ◽  
Specific Capacity ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Cycle Stability ◽  
High Quality ◽  
High Specific Capacity

High-quality Prussian blue crystals with a small number of vacancies and a low water content show high specific capacity and remarkable cycle stability as cathode materials for Na-ion batteries.

scholarly journals Serial Disulfide Polymers as Cathode Materials in Lithium-Sulfur Battery: Materials Optimization and Electrochemical Characterization

2020 ◽  
Vol 10 (7) ◽  
pp. 2538
Author(s):  
Jing Wang ◽  
Shichao Zhang
Keyword(s):  
Carbon Black ◽  
Cathode Materials ◽  
Retention Rate ◽  
Specific Capacity ◽  
Peanut Oil ◽  
Electrochemical Performances ◽  
Capacity Retention ◽  
Tung Oil ◽  
Conductive Carbon Black ◽  
Copolymer Poly

Herein, a series of novel disulfide polymers were synthesized by using the raw materials of diallyl-o-phthalate, tung oil, peanut oil, and styrene. Four kinds of products: Poly (sulfur-diallyl-o-phthalate) copolymer, poly (sulfur-tung oil) copolymer, poly (sulfur-peanut oil) copolymer, and poly (sulfur-styrene-peanut oil) terpolymer were characterized, and their solubility was studied and compared. Among the four kinds of disulfide polymers, poly (sulfur-styrene-peanut oil) terpolymer had the best solubility in an organic solvent, and it was chosen to be the active cathode material in Li-S battery. Subsequently, two different conductive additives—conductive carbon black and graphene were separately blended with this terpolymer to prepare two battery systems. The electrochemical performances of the two batteries were compared and analyzed. The result showed that the initial specific capacity of poly (sulfur-styrene-peanut oil) terpolymer (blended with conductive carbon black) battery was 935.88 mAh/g, with the capacity retention rate about 43.5%. Comparingly, the initial specific capacity of poly (sulfur-styrene-peanut oil) terpolymer (blended with graphene) battery was 1008.35 mAh/g, with the capacity retention rate around 60.59%. Therefore, the battery system of poly (sulfur-styrene-peanut oil) terpolymer with graphene showed a more stable cycle performance and better rate performance. This optimized system had a simple and environmental-friendly synthesis procedure, which showed a great application value in constructing cathode materials for the Li-S battery.

scholarly journals Improving the properties of Li4Ti5O12 - a promising anode material for lithium-ion batteries

2019 ◽  
Vol 108 ◽  
pp. 01018
Author(s):  
Danuta Olszewska ◽  
Jakub Niewiedział ◽  
Jakub Boczkowski
Keyword(s):  
Crystal Structure ◽  
Phase Composition ◽  
Specific Capacity ◽  
Stoichiometric Composition ◽  
Computer Software ◽  
Lithium Ion ◽  
Lithium Carbonate ◽  
Cycle Performance ◽  
High Specific Capacity ◽  
Voltage Range

Two materials with the stoichiometric composition Li3.85Ni0.15Ti5O12 and Li3.80Cu0.05Ni0.15Ti5O12 were obtained by solid-state reaction using lithium carbonate Li2CO3, titanium oxide TiO2, nickel oxide NiO and copper oxide CuO. The materials were characterized in terms of phase composition, crystal structure as well as cycle performance. Phase composition and crystal structure parameters were determined using X-ray Panalytical Empyrean XRD diffractometer in the range of 10-110° with CuKa radiation. The results were analyzed using Rietveld refinement which was then implemented in the GSAS computer software. The electrochemical properties of the samples were measured by galvanostatic charge/discharge cycles at different rates over a voltage range of 1.0-2.5 V and 0.2-2.5 V. Cyclic voltammetry measurements were also carried out. It was proved that the addition of both Ni and Cu results in high specific capacity of LTO especially at high current rates (2C and 5C). The sample Li3.80Cu0.05Ni0.15Ti5O12 delivers superior capacity above 200 mAh·g -1 when discharged to 0.2 V.

Superior electrochemical performance of Li3VO4/N-doped C as an anode for Li-ion batteries

2015 ◽  
Vol 3 (35) ◽  
pp. 17951-17955 ◽  
Author(s):  
Shibing Ni ◽  
Jicheng Zhang ◽  
Jianjun Ma ◽  
Xuelin Yang ◽  
Lulu Zhang
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Specific Capacity ◽  
Cycle Performance ◽  
Li Ion Batteries ◽  
High Specific Capacity ◽  
Li Ion

A high performance Li3VO4/N-doped C anode was successfully prepared, which shows high specific capacity and excellent cycle performance.

Flower-like C@V2O5 microspheres as highly electrochemically active cathode in aqueous zinc-ion batteries

2020 ◽  
Vol 10 (10) ◽  
pp. 1697-1703
Author(s):  
Zebin Wu ◽  
Wei Zhou ◽  
Zhen Liu ◽  
Yijie Zhou ◽  
Guilin Zeng ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Retention Rate ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Zinc Ion ◽  
Rate Performance ◽  
Capacity Retention ◽  
Facile Hydrothermal Method ◽  
High Specific Capacity ◽  
Electrochemically Active

Flower-like C@V2O5 microspheres with high specific capacity were synthesized by a facile hydrothermal method. The microstructure, specific capacity and electrochemical properties of C@V2O5 microspheres were studied. Results showed that the C@V2O5 microspheres with a diameter of ∼3 m are covered over by V2O5 nanosheets, and therefore have a large surface area which is almost 5 times higher than that of pure V2O5 powders. Moreover, the initial specific capacity of C@V2O5 microsphere is as high as 247.42 mAh · g–1, and after 100 cycles, the capacity retention rate is still 99.4%. Compared with pure V2O5, flower-like C@V2O5 microspheres show higher discharge specific capacity, better rate performance and more stable cycling performance.

scholarly journals Synthesis and electrochemical performance of NaV3O8 nanobelts for Li/Na-ion batteries and aqueous zinc-ion batteries

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20549-20556 ◽  
Author(s):  
Fang Hu ◽  
Di Xie ◽  
Fuhan Cui ◽  
Dongxu Zhang ◽  
Guihong Song
Keyword(s):  
Electrochemical Performance ◽  
Specific Capacity ◽  
Zinc Ion ◽  
Cycle Performance ◽  
Rate Performance ◽  
High Specific Capacity ◽  
Excellent Electrochemical Performance

Compared to the electrochemical performance for LIBs and NIBs, NaV3O8 nanobelts electrode for ZIBs shows excellent electrochemical performance, including high specific capacity of 421 mA h g−1 at 100 mA g−1, good rate performance and cycle performance.

High-discharge-voltage lithium-rich layered-oxide cathode materials based on low oxygen vacancy

2019 ◽  
Vol 48 (10) ◽  
pp. 3209-3213 ◽  
Author(s):  
Bin Zhang ◽  
Lve Wang ◽  
Fan Bai ◽  
Peng Xiao ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Cathode Materials ◽  
Discharge Voltage ◽  
Low Oxygen ◽  
Layered Oxides ◽  
High Discharge ◽  
Layered Oxide ◽  
Oxide Cathode

Lithium-rich layered oxides with low oxygen vacancy perform high discharge voltage.

Preparation of Microporous Supercapacitor Electrode Based on the Triple Networks of Disposable Sheet Mask

NANO ◽  
2019 ◽  
Vol 14 (12) ◽  
pp. 1950157
Author(s):  
Shasha Jiao ◽  
Tiehu Li ◽  
Chuanyin Xiong ◽  
Chen Tang ◽  
Alei Dang ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Three Dimensional ◽  
Cost Savings ◽  
High Specific Capacitance ◽  
Electrochemical Performances ◽  
Energy Storage Devices ◽  
Supercapacitor Electrode ◽  
High Specific Capacity ◽  
Storage Devices ◽  
New Ideas

In this study, a three-dimensional hybrid was synthesized via depositing of carbon nanotubes (CNTs) and ferroferric oxide (Fe3O4) particles on the abandoned disposable sheet mask fabric, followed by the polymerization of polypyrrole (PPY). The as-prepared nanocomposite shows superior electrochemical performances when it was used for the material for the flexible supercapacitor electrode. Benefiting from the synergistic effect of CNTs, Fe3O4 and PPY in such a porous structure, cyclic voltammetry and galvanostatic charge/discharge measurements indicated that the as-prepared hybrid possessed a good reversibility and high specific capacity at various scanning rates. It turned out that the as-prepared electrode demonstrated a high specific capacitance of 221.7[Formula: see text]F/g at the scanning rate of 50[Formula: see text]mV/s and long-life cycling stability of 88.2% after 10[Formula: see text]000 cycles. Besides, the electrode composite had good flexibility after repeated bending times of 3000. With the exception of improved electrochemical properties, this hybrid electrode material also showed many advantages, including facile preparation, flexibility and cost savings. These results will provide new ideas and solutions to design and fabricate the flexible supercapacitors, which has great prospect in the development of energy storage devices.

Ordered mesoporous TiC–C composites as cathode materials for Li–O2 batteries

2016 ◽  
Vol 52 (13) ◽  
pp. 2713-2716 ◽  
Author(s):  
Feilong Qiu ◽  
Ping He ◽  
Jie Jiang ◽  
Xueping Zhang ◽  
Shengfu Tong ◽  
...  
Keyword(s):  
Cathode Materials ◽  
Specific Capacity ◽  
High Specific Capacity ◽  
Ordered Mesoporous ◽  
Low Overpotential

Ordered mesoporous TiC–C (OMTC) composites were prepared and served as catalysts for nonaqueous Li–O2 batteries. The OMTC cathodes showed high specific capacity, low overpotential and good cyclability. Furthermore, the discharge and charge processes were investigated extensively by XRD, XPS and in situ GC-MS methods.

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