Rate Capability of Graphite Negative Electrode in Lithium-Ion Cell

2016 ◽  
Vol 74 (1) ◽  
pp. 171-178
Author(s):  
J. Libich ◽  
J. Maca ◽  
M. Sedlarikova ◽  
J. Vondrak ◽  
O. Cech
Keyword(s):  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Lithium Ion Cell

scholarly journals Nano-channel-based physical and chemical synergic regulation for dendrite-free lithium plating

Nano Research ◽  
2021 ◽  
Author(s):  
Qiang Guo ◽  
Wei Deng ◽  
Shengjie Xia ◽  
Zibo Zhang ◽  
Fei Zhao ◽  
...  
Keyword(s):  
Carbon Materials ◽  
Coating Layer ◽  
Effective Interaction ◽  
Debye Length ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Positive Electrode ◽  
Lithium Metal ◽  
Interaction Distance

AbstractUncontrollable dendrite growth resulting from the non-uniform lithium ion (Li+) flux and volume expansion in lithium metal (Li) negative electrode leads to rapid performance degradation and serious safety problems of lithium metal batteries. Although N-containing functional groups in carbon materials are reported to be effective to homogenize the Li+ flux, the effective interaction distance between lithium ions and N-containing groups should be relatively small (down to nanometer scale) according to the Debye length law. Thus, it is necessary to carefully design the microstructure of N-containing carbon materials to make the most of their roles in regulating the Li+ flux. In this work, porous carbon nitride microspheres (PCNMs) with abundant nanopores have been synthesized and utilized to fabricate a uniform lithiophilic coating layer having hybrid pores of both the nano- and micrometer scales on the Cu/Li foil. Physically, the three-dimensional (3D) porous framework is favorable for absorbing volume changes and guiding Li growth. Chemically, this coating layer can render a suitable interaction distance to effectively homogenize the Li+ flux and contribute to establishing a robust and stable solid electrolyte interphase (SEI) layer with Li-F, Li-N, and Li-O-rich contents based on the Debye length law. Such a physical-chemical synergic regulation strategy using PCNMs can lead to dendrite-free Li plating, resulting in a low nucleation overpotential and stable Li plating/stripping cycling performance in both the Li‖Cu and the Li‖Li symmetric cells. Meanwhile, a full cell using the PCNM coated Li foil negative electrode and a LiFePO4 positive electrode has delivered a high capacity retention of ∼ 80% after more than 200 cycles at 1 C and achieved a remarkable rate capability. The pouch cell fabricated by pairing the PCNM coated Li foil negative electrode with a NCM 811 positive electrode has retained ∼ 73% of the initial capacity after 150 cycles at 0.2 C.

Electrochemical Performance of Anode Materials for Lithium-Ion Power Batteries

2014 ◽  
Vol 1056 ◽  
pp. 3-7 ◽  
Author(s):  
Wan Hong Zhang ◽  
Kun Peng Wang
Keyword(s):  
Cyclic Voltammetry ◽  
Surface Morphology ◽  
Electrochemical Performance ◽  
Anode Materials ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Positive Influence ◽  
Negative Electrode Material

Graphite is widely used as the negative electrode material. To find out the influence of several different modified ways on the material's electrochemical performance, the electrochemical properties of 0318、0318-GLQ、MCMB22、AGP-3-2、AGP-3-2-1 and AGP-3-2-2 batteries were investigated by means of cyclic voltammetry (CV) experimental method. Results show that surface morphology, lithium intercalate/de-intercalate process, the first coulombic efficiency, reversibility and rate capability are all different for different material. Above all, AGP-3-2-2 has the best electrochemical performance, AGP-3-2 is worst, and the results prove that coating by pitch has a positive influence on the electrochemical performance of the material.

On the Implication of Porosity Configuration on Lithium-Ion Cell Performance: A Numerical Study

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Brajesh Kumar Kanchan ◽  
Pitambar R. Randive ◽  
Sukumar Pati
Keyword(s):  
Specific Energy ◽  
Salt Concentration ◽  
Power Dissipation ◽  
Numerical Study ◽  
Lithium Concentration ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Performance Characteristics ◽  
Cell Performance ◽  
Lithium Ion Cell

Abstract The present study numerically investigates the implication of different porosity configurations, viz., uniform, algebraic, trigonometric, logarithmic, and stepwise constant porosities at the negative electrode on performance characteristics of Lithium-ion cell. We assess the merit of nonuniform porosity over uniform one in terms of cell performance characteristics, viz., specific energy, capacity, electrolyte salt concentration, local volumetric current density, power dissipation density, and solid lithium concentration. Our results reveal that specific energy and capacity are found to be maximum when the porosity increases logarithmically in the direction from the negative electrode–current collector to negative electrode–separator interface. Also, it is found that the variation of power dissipation density and electrolyte salt concentration characteristics are dictated by the interplay of the porosity and the length of the negative electrode. Furthermore, the effect of charging rates (quick charge, fast charge, and ultrafast charge) on cell performance is carried out. It is seen that the increment in C-rates strongly influences the cell performance. It is found that the average capacity increases by 44% at the higher C-rate, i.e., 5C when the porosity increases logarithmically. On the contrary, sinusoidal variation in porosity yields in the worst cell performance. The findings of the present study bear utility toward designing an efficient battery system that can operate for a higher number of cycles with minimal power dissipation density and can fit into the ultrafast charging technique.

Irreversible capacity and rate-capability properties of lithium-ion negative electrode based on natural graphite

2017 ◽  
Vol 14 ◽  
pp. 383-390 ◽  
Author(s):  
Jiří Libich ◽  
Josef Máca ◽  
Jiří Vondrák ◽  
Ondřej Čech ◽  
Marie Sedlaříková
Keyword(s):  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Irreversible Capacity ◽  
Natural Graphite

Rate Capability Testing of Graphite Electrode Material

2021 ◽  
Vol 105 (1) ◽  
pp. 43-51
Author(s):  
Jiri Libich ◽  
Josef Maca ◽  
Marie Sedlarikova ◽  
Antonín Šimek ◽  
Pavel Cudek ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Electrode Materials ◽  
Graphite Electrode ◽  
Solid Electrolyte Interphase ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Lithium Ions ◽  
Sei Layer ◽  
Process Formation

The paper deals with the investigation of natural graphite electrode materials for lithium-ion batteries. These negative electrode materials operate on the intercalation principle where graphite plays a host role for lithium ions. There is a solid electrolyte interphase (SEI) layer which origins from electrode-electrolyte interphase. The SEI layer is a fundamental part of lithium-ion battery system and its quality defines and highly affects the overall quality of lithium-ion battery itself. Growth of the SEI layer is connected with the formation of new compounds. The process formation of SEI layer is linked to energy consumption (energy loss). What is most important is the fact that the growth of SEI layer consumes the significant amount of lithium ions provided from a limited positive electrode (cathode) source. In this work, the lithiation method was employed to reduce these undesirable side effects of the SEI growth.

Electrochemical Performance of Hard Carbon as Negative Electrode in Lithium Ion Capacitor

2014 ◽  
Vol 472 ◽  
pp. 587-590
Author(s):  
Mei Rong Yuan ◽  
Wei Qiang Liu ◽  
Yong Jin Xu
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Hard Carbon ◽  
Voltammetric Analysis ◽  
Energy Applications ◽  
Lithium Ion Capacitor ◽  
Negative Electrode Materials

The electrochemical properties of hard carbon (HC) have been investigated for use as negative electrode for lithium ion capacitors. The HC electrode was characterized by scanning electron microscope (SEM) method. The HC negative electrode was galvanostatically prelithiated at 0.1C for three cycles between 0.05-2 V. The LIC with activated carbon and HC electrodes was characterized by cyclic voltammetric analysis at the scan rate of 0.1 mV s-1 with different voltage ranges. The rate capability of the LIC was tested up to 100C and the retention is 54 %. The cycle performance is retained up to 86% at 50C and 80% at 100C even after 10,000 cycles. The results indicate that hard carbon is suitable as negative electrode materials for high power energy applications.

scholarly journals Nano Silicon Composite with Gelatin/Melamine Derived N-doped Carbon as an Efficient Anode Material for Li-ion Batteries

2021 ◽  
Vol 59 (11) ◽  
pp. 802-812
Author(s):  
Venugopal Nulu
Keyword(s):  
Anode Material ◽  
Structural Stability ◽  
Low Cost ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Cost Effective ◽  
Si Nanoparticles ◽  
Nitrogen Doped Carbon

Silicon (Si) has a high theoretical capacity and low working potential vs. Li/Li+, and has been investigated as the most capable negative electrode material for lithium-ion batteries (LIBs). However, Si undergoes significant volume changes during the Li+ alloying/ dealloying processes, leading to unstable cycle life and limiting its practical applicability in anodes. Introducing carbon into the Si anodes can effectively address the Si drawbacks, while providing advantages of improved conductivity and structural stability. In this study we choose gelatin/ melamine combination as an eco-friendly and cost-effective source for nitrogendoped carbon to make a Si composite. The prepared composite was studied as an anode material for LIBs, and it delivered excellent cyclability with 2175 mAh g-1 capacity after 50 cycles with 86% capacity retention at 200 mA g-1. The composite exhibited superior rate capability and improved Li+ diffusion properties compared with bare Si nanoparticles (Si NP). The significant enhancement could be attributed to the structural stability and conductivity provided by the nitrogen-doped carbon matrix. This work promotes emerging batteries with low-cost materials as a promising solution for increasing energy storage requirements.

Li5Cr7Ti6O25 as a novel negative electrode material for lithium-ion batteries

2015 ◽  
Vol 51 (74) ◽  
pp. 14050-14053 ◽  
Author(s):  
Ting-Feng Yi ◽  
Jie Mei ◽  
Yan-Rong Zhu ◽  
Zi-Kui Fang
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Material ◽  
Sol Gel ◽  
Rate Capability ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Discharge Performance ◽  
Gel Method ◽  
Negative Electrode Material ◽  
Charge Discharge

Novel submicron Li5Cr7Ti6O25, which exhibits excellent rate capability, high cycling stability and fast charge–discharge performance, is constructed using a facile sol–gel method.

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