scholarly journals High-Energy and High-Power Pseudocapacitor–Battery Hybrid Sodium-Ion Capacitor with Na+ Intercalation Pseudocapacitance Anode

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Qiulong Wei ◽  
Qidong Li ◽  
Yalong Jiang ◽  
Yunlong Zhao ◽  
Shuangshuang Tan ◽  
...  
Keyword(s):  
Energy Density ◽  
High Power ◽  
Anode Materials ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density

AbstractHigh-performance and low-cost sodium-ion capacitors (SICs) show tremendous potential applications in public transport and grid energy storage. However, conventional SICs are limited by the low specific capacity, poor rate capability, and low initial coulombic efficiency (ICE) of anode materials. Herein, we report layered iron vanadate (Fe5V15O39 (OH)9·9H2O) ultrathin nanosheets with a thickness of ~ 2.2 nm (FeVO UNSs) as a novel anode for rapid and reversible sodium-ion storage. According to in situ synchrotron X-ray diffractions and electrochemical analysis, the storage mechanism of FeVO UNSs anode is Na+ intercalation pseudocapacitance under a safe potential window. The FeVO UNSs anode delivers high ICE (93.86%), high reversible capacity (292 mAh g−1), excellent cycling stability, and remarkable rate capability. Furthermore, a pseudocapacitor–battery hybrid SIC (PBH-SIC) consisting of pseudocapacitor-type FeVO UNSs anode and battery-type Na3(VO)2(PO4)2F cathode is assembled with the elimination of presodiation treatments. The PBH-SIC involves faradaic reaction on both cathode and anode materials, delivering a high energy density of 126 Wh kg−1 at 91 W kg−1, a high power density of 7.6 kW kg−1 with an energy density of 43 Wh kg−1, and 9000 stable cycles. The tunable vanadate materials with high-performance Na+ intercalation pseudocapacitance provide a direction for developing next-generation high-energy capacitors.

Pseudocapacitive behaviours of Na2Ti3O7@CNT coaxial nanocables for high-performance sodium-ion capacitors

2015 ◽  
Vol 3 (42) ◽  
pp. 21277-21283 ◽  
Author(s):  
Shengyang Dong ◽  
Laifa Shen ◽  
Hongsen Li ◽  
Ping Nie ◽  
Yaoyao Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density ◽  
High Power Density ◽  
Coaxial Nanocables

Pseudocapacitive behaviours of Na2Ti3O7@CNTs enhance the electrochemical performance of Na-ion capacitors with high energy density and high power density.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

Interfacial electron modulation of MoS2/black phosphorus heterostructure toward high-rate and high-energy density half/full sodium-ion batteries

2021 ◽  
Author(s):  
Chenrui Zhang ◽  
Tingting Liang ◽  
Huilong Dong ◽  
Junjun Li ◽  
Junyu Shen ◽  
...  
Keyword(s):  
Energy Density ◽  
Volume Expansion ◽  
Anode Materials ◽  
Large Scale ◽  
Electrochemical Reaction ◽  
High Energy ◽  
Sodium Ion ◽  
High Rate ◽  
High Energy Density ◽  
Sodium Ion Batteries

Sodium-ion batteries (SIBs) have been considered as promising candidates for large-scale energy storage. However, viable anode materials still suffer from sluggish electrochemical reaction kinetics and huge volume expansion during cycling,...

Constructing consistent pore microstructures of bacterial cellulose-derived cathode and anode materials for high energy density sodium-ion capacitors

2020 ◽  
Vol 44 (5) ◽  
pp. 1865-1871 ◽  
Author(s):  
Tianyun Zhang ◽  
Fujuan Wang ◽  
Liang Yang ◽  
Hongxia Li ◽  
Jiangtao Chen ◽  
...  
Keyword(s):  
Energy Density ◽  
Bacterial Cellulose ◽  
Anode Materials ◽  
High Energy ◽  
Sodium Ion ◽  
High Energy Density

Bacterial cellulose-derived cathode and anode with similar carbon microstructure are well match in kinetic for high energy density sodium-ion capacitor.

High-Performance Asymmetric Supercapacitors Based on the Ni1.5Co1.5S4@CNTs Nanocomposites

NANO ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. 2050136
Author(s):  
Xuan Zheng ◽  
Xingxing He ◽  
Jinlong Jiang ◽  
Zhengfeng Jia ◽  
Yu Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Performance ◽  
Specific Capacity ◽  
Negative Electrode ◽  
High Energy ◽  
Cycling Stability ◽  
Power Delivery ◽  
High Energy Density ◽  
Practical Applications

In this paper, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs nanocomposites containing different carbon nanotubes (CNT) content were prepared by a one-step hydrothermal method. More hydroxyl and carboxyl groups were introduced on the surface of CNTs by acidizing treatment to increase the dispersion of CNTs. The acid-treated CNTs can more fully compound with Ni[Formula: see text]Co[Formula: see text]S4 nanoparticles to form heterostructure. When the CNTs content is 10[Formula: see text]wt.%, the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite exhibits the highest specific capacity of 210[Formula: see text]mAh[Formula: see text]g[Formula: see text] in KOH aqueous electrolytes at current density of 1[Formula: see text]A[Formula: see text]g[Formula: see text]. The superior performances of the Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 nanocomposite are attributed to the effective synergic effects of the high specific capacity of Ni[Formula: see text]Co[Formula: see text]S4 and the excellent conductivity of CNTs. An asymmetric supercapacitor (ASC) was assembled based on Ni[Formula: see text]Co[Formula: see text]S4@CNTs-10 positive electrode and activated carbon (AC) negative electrode, which delivers a high energy density of 61.2[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 800[Formula: see text]W[Formula: see text]kg[Formula: see text], and maintains 34.8[Formula: see text]Wh[Formula: see text]kg[Formula: see text] at a power density of 16079[Formula: see text]W[Formula: see text]kg[Formula: see text]. Also, the ASC device shows an excellent cycling stability with 91.49% capacity retention and above 94% Columbic efficiency after 10 000 cycles at 10[Formula: see text]A[Formula: see text]g[Formula: see text]. This aqueous asymmetric Ni[Formula: see text]Co[Formula: see text]S4@CNTs//AC supercapacitor is promising for practical applications due to its advantages such as high energy density, power delivery and cycling stability.

PROPORTIONAL EFFECT IN SbSi/N-DOPED GRAPHENE NANOCOMPOSITE PREPARATION FOR HIGH-PERFORMANCE LITHIUM-ION BATTERIES

2021 ◽  
pp. 2150105
Author(s):  
NARUEPHON MAHAMAI ◽  
THANAPHAT AUTTHAWONG ◽  
AISHUI YU ◽  
THAPANEE SARAKONSRI
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
High Performance ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Morphological Identification ◽  
Synthesis Methods ◽  
Doped Graphene

Lithium-ion batteries (LIBs) have become commercialized technologies for the modern and future world, but commercial batteries using graphite still have a low specific capacity and are concerned with safety issues. Silicon (Si) and antimony (Sb) nanocomposites have the tendency to be synthesized as high-energy-density anode materials which can be a solution for the above-mentioned problems. This work reported the synthesis methods and characterization of Sb and Si composited with nitrogen-doped graphene (SbSi/NrGO) by facile chemical method and thermal treatment. Si was obtained by magnesiothermic reduction of SiO2 derived from rice husk, waste from the agricultural process. To study the phases, particle distributions, and morphologies, all prepared composites were characterized. In this experiment, the phase compositions were confirmed as [Formula: see text]-Si, [Formula: see text]-Si, SiC, Sb, and shifted peaks of expanded C which were caused by NrGO synthesis. Interestingly, a good distribution of Si and Sb particles on the NrGO surface was obtained in 15Sb15Si/NrGO composition. It could be due to appropriate Sb and Si contents on the NrGO surface area in composite materials. Morphological identification of synthesized products represented the Sb and Si particles in nanoscale dispersed on thin wrinkled-paper NrGO. These results suggested that the synthesis method in this paper is appropriate to prepare SbSi/NrGO nanocomposites to be used as high-performance anode materials in high-performance LIBs for advanced applications.

Recent Progress of Anode and Cathode Materials for Lithium Ion Battery

2021 ◽  
Vol 1027 ◽  
pp. 69-75
Author(s):  
Run Yu Liu
Keyword(s):  
Energy Density ◽  
Lithium Ion Battery ◽  
Power Supply ◽  
Cathode Materials ◽  
Anode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Discharge Process

Lithium ion battery is a kind of secondary battery that mainly relies on lithium ions moving between a positive electrode and a negative electrode. Lithium-ion batteries are considered to be the most ideal automotive power battery and has been widely applied in EV industry due to the outstanding advantages including but not limited to high energy density, high open circuit voltage and wide operating temperature range. The technical bottleneck of lithium-ion power batteries is how to further increase the energy density and optimize operating performance at low temperature. Besides, how to decrease the cost for lithium ion battery is also a big problem. The higher potential end of the power supply device is called cathode materials and the lower potential end of the power supply is called anode materials. At cathode end, Lithium ion intercalation process happens during discharging cycle and lithium ion deintercalation process happens during charging.For anode end, Lithium ion deintercalation process happens during charging cycle and lithium ion insertion process happens during discharging process. Good cathode/anode materials should include but not limited to the following characters: large specific capacity density, long cycling lifetime, good rate performance, proper electric potential and relatively stable structure during charge and discharge process.

CNFs/S1-xSex Composites as Promising Cathode Materials for High-Energy Lithium-Sulfur Batteries

MRS Advances ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 821-828 ◽  
Author(s):  
Gaind P. Pandey ◽  
Kobi Jones ◽  
Lamartine Meda
Keyword(s):  
Cathode Material ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Rate Capability ◽  
Composite Cathode ◽  
High Energy ◽  
High Mass ◽  
High Performance Composite ◽  
Lithium Sulfur

ABSTRACTHigh-energy lithium-sulfur (Li-S) batteries still suffer from poor rate capability and short cycle life caused by the polysulfides shuttle and insulating nature of S (and the discharge product, Li2S). Selenium disulfide (SeS2), with a theoretical specific capacity of 1342 mAh g−1, is a promising cathode material as it has better conductivity compared to sulfur. The electrochemical reaction kinetics of CNFs-S/SeS2 composites (denoted as CNFs/S1-xSex, where x ≤ 0.1) are expected to be remarkably improved because of the better conductivity of SeS2 compared to sulfur. Here, a high-performance composite cathode material of CNFs/S1-xSex for novel Li-S batteries is reported. The CNFs/S1-xSex composites combine the higher conductivity and higher density of SeS2 with high specific capacity of sulfur. The CNFs/S1-xSex electrode shows good initial discharge capacity of ∼1050 mAh g−1 at 0.05 C rate with high mass loading of materials (∼6-7 mg cm−2 of composites) and > 97% initial coulombic efficiency. The CNFs/S1-xSex electrode shows more than 600 mAh g-1 specific capacity after 50 charge-discharge cycles at 0.5C rate, much higher compared to the CNFs/S cathodes.

scholarly journals Facile Synthesis of FeS@C Particles Toward High-Performance Anodes for Lithium-Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1467
Author(s):  
Xuanni Lin ◽  
Zhuoyi Yang ◽  
Anru Guo ◽  
Dong Liu
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
High Current Density ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Hierarchical Porous

High energy density batteries with high performance are significantly important for intelligent electrical vehicular systems. Iron sulfurs are recognized as one of the most promising anodes for high energy density lithium-ion batteries because of their high theoretical specific capacity and relatively stable electrochemical performance. However, their large-scale commercialized application for lithium-ion batteries are plagued by high-cost and complicated preparation methods. Here, we report a simple and cost-effective method for the scalable synthesis of nanoconfined FeS in porous carbon (defined as FeS@C) as anodes by direct pyrolysis of an iron(III) p-toluenesulfonate precursor. The carbon architecture embedded with FeS nanoparticles provides a rapid electron transport property, and its hierarchical porous structure effectively enhances the ion transport rate, thereby leading to a good electrochemical performance. The resultant FeS@C anodes exhibit high reversible capacity and long cycle life up to 500 cycles at high current density. This work provides a simple strategy for the mass production of FeS@C particles, which represents a critical step forward toward practical applications of iron sulfurs anodes.

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