Reinforcing the surface conductivity and stability of primary particles for high-performance Li-rich layered Li1.18Mn0.52Co0.15Ni0.15O2via an integrated strategy

2020 ◽  
Vol 7 (17) ◽  
pp. 3154-3164
Author(s):  
Xianghuan Liu ◽  
Zhenyao Wang ◽  
Weidong Zhuang ◽  
Zhao Li ◽  
Wenjin Li ◽  
...  
Keyword(s):  
Structural Stability ◽  
High Performance ◽  
Rate Capability ◽  
Protective Layer ◽  
Surface Conductivity ◽  
Spinel Layer ◽  
Integrated Strategy ◽  
Primary Particles

A novel integrated Li3PO4 and spinel layer on primary particles surface was constructed by a facile synchronous route. It acts as a protective layer and a 3D Li+ diffusion network, leading to a superior structural stability and rate capability.

Accelerating ion diffusion with unique three-dimensionally interconnected nanopores for self-membrane high-performance pseudocapacitors

Nanoscale ◽  
2017 ◽  
Vol 9 (46) ◽  
pp. 18311-18317 ◽  
Author(s):  
Yuan Gao ◽  
Yuanjing Lin ◽  
Zehua Peng ◽  
Qingfeng Zhou ◽  
Zhiyong Fan
Keyword(s):  
Aspect Ratio ◽  
Surface Area ◽  
Structural Stability ◽  
High Aspect Ratio ◽  
High Performance ◽  
Three Dimensional ◽  
Rate Capability ◽  
Large Surface Area ◽  
Nanoporous Structure ◽  
Ion Diffusion

Three-dimensional interconnected nanoporous structure (3-D INPOS) possesses high aspect ratio, large surface area, as well as good structural stability. Profiting from its unique interconnected architecture, the 3-D INPOS pseudocapacitor achieves a largely enhanced capacitance and rate capability.

Enhanced structural stability and overall conductivity of Li-rich layered oxide materials achieved by a dual electron/lithium-conducting coating strategy for high-performance lithium-ion batteries

2019 ◽  
Vol 7 (41) ◽  
pp. 23964-23972 ◽  
Author(s):  
Dan Gao ◽  
Zhisen Zeng ◽  
Hongwei Mi ◽  
Lingna Sun ◽  
Xiangzhong Ren ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Structural Stability ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
Oxide Materials ◽  
Layered Oxide ◽  
Conducting Coating

A dual coating of LATP and CNTs accelerates the transportation of Li+ and electrons, resulting in improved rate capability.

Turbostratic carbon-localised FeS2 nanocrystals as anodes for high-performance sodium-ion batteries

Nanoscale ◽  
2019 ◽  
Vol 11 (33) ◽  
pp. 15497-15507 ◽  
Author(s):  
Yanyan Liu ◽  
Long Zhang ◽  
Di Liu ◽  
Wentao Hu ◽  
Xinlin Yan ◽  
...  
Keyword(s):  
Structural Stability ◽  
High Performance ◽  
Rate Capability ◽  
Sodium Ion ◽  
High Rate ◽  
Sodium Ion Batteries ◽  
High Rate Capability ◽  
Turbostratic Carbon ◽  
Carbon Framework ◽  
Diffusion Paths

FeS2–C nano-network containing localised FeS2 nanocrystals wrapped by a t-carbon framework enables FeS2/C hybridizations to maintain structural stability upon cycling and shortens the electrons/ions diffusion paths for a high rate capability.

Superionic Lithium Intercalation through 2 nm x 2 nm Columns in the Crystallographic Shear Phase Nb18W8O69

2019 ◽  
Author(s):  
Kent Griffith ◽  
Clare Grey
Keyword(s):  
High Performance ◽  
Rate Capability ◽  
Block Size ◽  
Lithium Intercalation ◽  
Resonance Spectroscopy ◽  
Complex Metal Oxides ◽  
Battery Electrode ◽  
Crystallographic Shear ◽  
Battery Material ◽  
First Time

Nb18W8O69 (9Nb2O5×8WO3) is the tungsten-rich end-member of the Wadsley–Roth crystallographic shear (cs) structures within the Nb2O5–WO3 series. It has the largest block size of any known, stable Wadsley–Roth phase, comprising 5 ´ 5 units of corner-shared MO6 octahedra between the shear planes, giving rise to 2 nm ´ 2 nm blocks. Rapid lithium intercalation is observed in this new candidate battery material and 7Li pulsed field gradient nuclear magnetic resonance spectroscopy – measured in a battery electrode for the first time at room temperature – reveals superionic lithium conductivity. In addition to its promising rate capability, Nb18W8O69 adds a piece to the larger picture of our understanding of high-performance Wadsley–Roth complex metal oxides.

Strategically Controlled Flash Irradiation on Silicon Anode for Enhancing Cycling Stability and Rate Capability toward High-Performance Lithium-Ion Batteries

2021 ◽  
Vol 13 (13) ◽  
pp. 15205-15215
Author(s):  
Jae Young Seok ◽  
Sanha Kim ◽  
Inyeong Yang ◽  
Jung Hwan Park ◽  
Jaehak Lee ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Silicon Anode

scholarly journals One-Pot Synthesis of Glucose-Derived Carbon Coated Ni3S2 Nanowires as a Battery-Type Electrode for High Performance Supercapacitors

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 678
Author(s):  
Zhongkai Wu ◽  
Haifu Huang ◽  
Wenhui Xiong ◽  
Shiming Yang ◽  
Huanhuan Huang ◽  
...  
Keyword(s):  
Carbon Source ◽  
High Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
One Pot ◽  
Great Performance ◽  
Carbon Coated ◽  
Binder Free ◽  
Coated Carbon ◽  
Supercapacitor Applications

We report a novel Ni3S2 carbon coated (denoted as NCC) rod-like structure prepared by a facile one-pot hydrothermal method and employ it as a binder free electrode in supercapacitor. We coated carbon with glucose as carbon source on the surface of samples and investigated the suitable glucose concentration. The as-obtained NCC rod-like structure demonstrated great performance with a huge specific capacity of 657 C g−1 at 1 A g−1, preeminent rate capability of 87.7% retention, the current density varying to 10 A g−1, and great cycling stability of 76.7% of its original value through 3500 cycles, which is superior to the properties of bare Ni3S2. The result presents a facile, general, viable strategy to constructing a high-performance material for the supercapacitor applications.

scholarly journals Oxygen-Deficient Stannic Oxide/Graphene for Ultrahigh-Performance Supercapacitors and Gas Sensors

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 372
Author(s):  
Liyang Lin ◽  
Susu Chen ◽  
Tao Deng ◽  
Wen Zeng
Keyword(s):  
Energy Storage ◽  
Gas Sensors ◽  
High Performance ◽  
Gas Sensing ◽  
Synthesis Method ◽  
Rate Capability ◽  
Stannic Oxide ◽  
Energy Storage Devices ◽  
Graphene Nanocomposites ◽  
Storage Devices

The metal oxides/graphene nanocomposites have great application prospects in the fields of electrochemical energy storage and gas sensing detection. However, rational synthesis of such materials with good conductivity and electrochemical activity is the topical challenge for high-performance devices. Here, SnO2/graphene nanocomposite is taken as a typical example and develops a universal synthesis method that overcome these challenges and prepares the oxygen-deficient SnO2 hollow nanospheres/graphene (r-SnO2/GN) nanocomposite with excellent performance for supercapacitors and gas sensors. The electrode r-SnO2/GN exhibits specific capacitance of 947.4 F g−1 at a current density of 2 mA cm−2 and of 640.0 F g−1 even at 20 mA cm−2, showing remarkable rate capability. For gas-sensing application, the sensor r-SnO2/GN showed good sensitivity (~13.8 under 500 ppm) and short response/recovering time toward methane gas. These performance features make r-SnO2/GN nanocomposite a promising candidate for high-performance energy storage devices and gas sensors.

scholarly journals Achieving High-Performance Spherical Natural Graphite Anode through a Modified Carbon Coating for Lithium-Ion Batteries

Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1946 ◽  
Author(s):  
Hae-Jun Kwon ◽  
Sang-Wook Woo ◽  
Yong-Ju Lee ◽  
Je-Young Kim ◽  
Sung-Man Lee
Keyword(s):  
High Performance ◽  
Carbon Coating ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
Rate Performance ◽  
Natural Graphite ◽  
Artificial Graphite ◽  
Ag Electrodes ◽  
Natural Graphite Anode

The electrochemical performance of modified natural graphite (MNG) and artificial graphite (AG) was investigated as a function of electrode density ranging from 1.55 to 1.7 g∙cm−3. The best performance was obtained at 1.55 g∙cm−3 and 1.60 g∙cm−3 for the AG and MNG electrodes, respectively. Both AG, at a density of 1.55 g∙cm−3, and MNG, at a density of 1.60 g∙cm−3, showed quite similar performance with regard to cycling stability and coulombic efficiency during cycling at 30 and 45 °C, while the MNG electrodes at a density of 1.60 g∙cm−3 and 1.7 g∙cm−3 showed better rate performance than the AG electrodes at a density of 1.55 g∙cm−3. The superior rate capability of MNG electrodes can be explained by the following effects: first, their spherical morphology and higher electrode density led to enhanced electrical conductivity. Second, for the MNG sample, favorable electrode tortuosity was retained and thus Li+ transport in the electrode pore was not significantly affected, even at high electrode densities of 1.60 g∙cm−3 and 1.7 g∙cm−3. MNG electrodes also exhibited a similar electrochemical swelling behavior to the AG electrodes.

scholarly journals Hierarchical Porous RGO/PEDOT/PANI Hybrid for Planar/Linear Supercapacitor with Outstanding Flexibility and Stability

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Fuwei Liu ◽  
Luoyuan Xie ◽  
Li Wang ◽  
Wei Chen ◽  
Wei Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Density ◽  
Structural Design ◽  
High Performance ◽  
Rate Capability ◽  
Cotton Yarn ◽  
Reduced Graphene ◽  
Hierarchical Porous ◽  
Good Rate Capability ◽  
Electrodes For Supercapacitors

AbstractMany hybrid electrodes for supercapacitors (SCs) are a reckless combination without proper structural design that keeps them from fulfilling their potential. Herein, we design a reduced graphene oxide/poly(3,4-ethylenedioxythiophene)/polyaniline (RGO/PEDOT/PANI) hybrid with hierarchical and porous structure for high-performance SCs, where components fully harness their advantages, forming an interconnected and conductive framework with substantial reactive sites.Thus, this hybrid achieves a high capacitance of 535 F g−1 along with good rate capability and cyclability. The planar SC based on this hybrid deliver an energy density of 26.89 Wh kg−1 at a power density of 800 W kg−1. The linear SC developed via modifying a cotton yarn with the hybrid exhibits good flexibility and structural stability, which operates normally after arbitrary deformations. This work provides a beneficial reference for developing SCs.

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