scholarly journals Study on Stability and Electrochemical Properties of Nano-LiMn1.9Ni0.1O3.99S0.01-Based Li-Ion Batteries with Liquid Electrolyte Containing LiPF6

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Monika Bakierska ◽  
Michał Świętosławski ◽  
Marta Gajewska ◽  
Dorota Majda ◽  
Marek Drozdek ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Rate Capability ◽  
Liquid Electrolyte ◽  
Improved Stability ◽  
Electrochemical Cycling ◽  
Oxide Spinel ◽  
Lithium Manganese Oxide Spinel ◽  
The Stability

Herein, we report on the stability and electrochemical properties of nanosized Ni and S doped lithium manganese oxide spinel (LiMn1.9Ni0.1O3.99S0.01, LMN1OS) in relation to the most commonly used electrolyte solution containing LiPF6salt. The influence of electrochemical reaction in the presence of selected electrolyte on the LMN1OS electrode chemistry was examined. The changes in the structure, surface morphology, and composition of the LMN1OS cathode after 30 cycles of galvanostatic charging/discharging were determined. In addition, thermal stability and reactivity of the LMN1OS material towards the electrolyte system were verified. Performed studies revealed that no degradative effects, resulting from the interaction between the spinel electrode and liquid electrolyte, occur during electrochemical cycling. The LMN1OS electrode versus LiPF6-based electrolyte has been indicated as an efficient and electrochemically stable system, exhibiting high capacity, good rate capability, and excellent coulombic efficiency. The improved stability and electrochemical performance of the LMN1OS cathode material originate from the synergetic substitution of LiMn2O4spinel with Ni and S.

Nanostructured anode materials for Li-ion batteries

2008 ◽  
Vol 80 (11) ◽  
pp. 2283-2295 ◽  
Author(s):  
Nahong Zhao ◽  
Lijun Fu ◽  
Lichun Yang ◽  
Tao Zhang ◽  
Gaojun Wang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Anode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Cycling Behavior

This paper focuses on the latest progress in the preparation of a series of nanostructured anode materials in our laboratory and their electrochemical properties for Li-ion batteries. These anode materials include core-shell structured Si nanocomposites, TiO2 nanocomposites, novel MoO2 anode material, and carbon nanotube (CNT)-coated SnO2 nanowires (NWs). The substantial advantages of these nanostructured anodes provide greatly improved electrochemical performance including high capacity, better cycling behavior, and rate capability.

scholarly journals Nanostructured Si-C Composites As High-Capacity Anode Material For All-Solid-State Lithium-Ion Batteries

2021 ◽  
Author(s):  
Stephanie Poetke ◽  
Felix Hippauf ◽  
Anne Baasner ◽  
Susanne Dörfler ◽  
Holger Althues ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Batteries ◽  
Silicon Nanoparticles ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Liquid Electrolyte ◽  
Side Reactions ◽  
Silicon Carbon

<p>Silicon carbon void structures (Si-C) are attractive anode materials for Lithium-ion batteries to cope with the volume changes of silicon during cycling. In this study, Si-C with varying Si contents (28 ‑ 37 %) are evaluated in all-solid-state batteries (ASSBs) for the first time. The carbon matrix enables enhanced performance and lifetime of the Si-C composites compared to bare silicon nanoparticles in half-cells even at high loadings of up to 7.4 mAh cm<sup>-2</sup>. In full cells with nickel-rich NCM (LiNi<sub>0.9</sub>Co<sub>0.05</sub>Mn<sub>0.05</sub>O<sub>2</sub>, 210 mAh g<sup>-1</sup>), kinetic limitations in the anode lead to a lowered voltage plateau compared to NCM half-cells. The solid electrolyte (Li<sub>6</sub>PS<sub>5</sub>Cl, 3 mS cm<sup>-1</sup>) does not penetrate the Si-C void structure resulting in less side reactions and higher initial coulombic efficiency compared to a liquid electrolyte (72.7 % vs. 31.0 %). Investigating the influence of balancing of full cells using 3-electrode ASSB cells revealed a higher delithiation of the cathode as a result of the higher cut-off voltage of the anode at high n/p ratios. During galvanostatic cycling, full cells with either a low or rather high overbalancing of the anode showed the highest capacity retention of up to 87.7 % after 50 cycles. </p>

Electrochemical Properties of Highly Ordered TiO2 Nanotube Arrays as an Anode Material for Lithium-Ion Batteries

2011 ◽  
Vol 130-134 ◽  
pp. 1281-1285 ◽  
Author(s):  
Li Li Wang ◽  
Shi Chao Zhang ◽  
Xiao Meng Wu
Keyword(s):  
Electrochemical Properties ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Nanotube Arrays ◽  
Rate Performance ◽  
Treatment Rate ◽  
High Rate Capability ◽  
Nanotube Array

Well-aligned TiO2 nanotube arrays were fabricated from anodization by a subsequent heat treatment. Rate performance and electrochemical properties of TiO2 nanotube arrays were studied intensively. The electrode exhibits excellent rate capabilities at various rates with an average coulombic efficiency reaching 95.6%. It is obvious that TiO2 nanotube array possesses high rate capability and excellent cycling stability.

scholarly journals Intercalating Sn/Fe Nanoparticles in Compact Carbon Monolith for Enhanced Lithium Ion Storage

2020 ◽  
Vol 10 (7) ◽  
pp. 2220
Author(s):  
Jie Deng ◽  
Yu Dai ◽  
Hui Dai ◽  
Luming Li
Keyword(s):  
Metal Oxides ◽  
Coulombic Efficiency ◽  
Scale Up ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Binary Metal ◽  
Carbon Monolith ◽  
Tap Density ◽  
Initial Coulombic Efficiency

Given its high-capacity of multielectron (de-)lithiation, SnO2 is deemed as a competitive anode substance to tackle energy density restrictions of low-theoretical-capacity traditional graphite. However, its pragmatic adhibition seriously encounters poor initial coulombic efficiency from irreversible Li2O formation and drastic volume change during repeated charge/discharge. Here, an applicable gel pyrolysis methodology establishes a SnO2/Fe2O3 intercalated carbon monolith as superior anode materials for Li ion batteries to effectively surmount problems of SnO2. Its bulk-like, micron-sized, compact, and non-porous structures with low area surfaces (14.2 m2 g−1) obviously increase the tap density without compromising the transport kinetics, distinct from myriad hierarchically holey metal/carbon materials recorded till date. During the long-term Li+ insertion/extraction, the carbon matrix not only functions as a stress management framework to alleviate the stress intensification on surface layers, enabling the electrode to retain its morphological/mechanic integrity and yielding a steady solid electrolyte interphase film, but also imparts very robust connection to stop SnO2 from coarsening/losing electric contact, facilitating fast electrolyte infiltration and ion/electron transfer. Besides, the closely contacted and evenly distributed Fe2O3/SnO2 nanoparticles supply additional charge-transfer driving force, thanks to a built-in electric field. Benefiting from such virtues, the embedment of binary metal oxides in the dense carbons enhances initial Coulombic efficiency up to 67.3%, with an elevated reversible capacity of 726 mAh/g at 0.2 A/g, a high capacity retention of 84% after 100 cycles, a boosted rate capability between 0.2 and 3.2 A g−1, and a stable cycle life of 466 mAh/g over 200 cycles at 1 A g−1. Our scenario based upon this unique binary metal-in-carbon sandwich compact construction to achieve the stress regulation and the so-called synergistic effect between metals or metal oxides and carbons is economically effective and tractable enough to scale up the preparation and can be rifely employed to other oxide anodes for ameliorating their electrochemical properties.

scholarly journals Enhanced Electrochemical Performance Promoted by Tin in Silica Anode Materials for Stable and High-Capacity Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1071
Author(s):  
Xuli Ding ◽  
Daowei Liang ◽  
Hongda Zhao
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Silicon Oxide ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Phase Evolution ◽  
Discharge Process

Although the silicon oxide (SiO2) as an anode material shows potential and promise for lithium-ion batteries (LIBs), owing to its high capacity, low cost, abundance, and safety, severe capacity decay and sluggish charge transfer during the discharge–charge process has caused a serious challenge for available applications. Herein, a novel 3D porous silicon oxide@Pourous Carbon@Tin (SiO2@Pc@Sn) composite anode material was firstly designed and synthesized by freeze-drying and thermal-melting self-assembly, in which SiO2 microparticles were encapsulated in the porous carbon as well as Sn nanoballs being uniformly dispersed in the SiO2@Pc-like sesame seeds, effectively constructing a robust and conductive 3D porous Jujube cake-like architecture that is beneficial for fast ion transfer and high structural stability. Such a SiO2@Pc@Sn micro-nano hierarchical structure as a LIBs anode exhibits a large reversible specific capacity ~520 mAh·g−1, initial coulombic efficiency (ICE) ~52%, outstanding rate capability, and excellent cycling stability over 100 cycles. Furthermore, the phase evolution and underlying electrochemical mechanism during the charge–discharge process were further uncovered by cyclic voltammetry (CV) investigation.

Electrochemical properties of an aluminum anode in an ionic liquid electrolyte for rechargeable aluminum-ion batteries

2017 ◽  
Vol 19 (13) ◽  
pp. 8653-8656 ◽  
Author(s):  
Sangwon Choi ◽  
Hyungho Go ◽  
Gibaek Lee ◽  
Yongsug Tak
Keyword(s):  
Ionic Liquid ◽  
Oxide Film ◽  
Electrochemical Properties ◽  
High Capacity ◽  
Liquid Electrolyte ◽  
Aluminum Anode ◽  
Ionic Liquid Electrolyte ◽  
Aluminum Ion ◽  
Surface Corrosion ◽  
Stable Surface

An electro-polished aluminum anode without the oxide film exhibits high capacity and stable surface corrosion.

scholarly journals Nanostructured Si-C Composites As High-Capacity Anode Material For All-Solid-State Lithium-Ion Batteries

2021 ◽  
Author(s):  
Stephanie Poetke ◽  
Felix Hippauf ◽  
Anne Baasner ◽  
Susanne Dörfler ◽  
Holger Althues ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Batteries ◽  
Silicon Nanoparticles ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Liquid Electrolyte ◽  
Side Reactions ◽  
Silicon Carbon

<p>Silicon carbon void structures (Si-C) are attractive anode materials for Lithium-ion batteries to cope with the volume changes of silicon during cycling. In this study, Si-C with varying Si contents (28 ‑ 37 %) are evaluated in all-solid-state batteries (ASSBs) for the first time. The carbon matrix enables enhanced performance and lifetime of the Si-C composites compared to bare silicon nanoparticles in half-cells even at high loadings of up to 7.4 mAh cm<sup>-2</sup>. In full cells with nickel-rich NCM (LiNi<sub>0.9</sub>Co<sub>0.05</sub>Mn<sub>0.05</sub>O<sub>2</sub>, 210 mAh g<sup>-1</sup>), kinetic limitations in the anode lead to a lowered voltage plateau compared to NCM half-cells. The solid electrolyte (Li<sub>6</sub>PS<sub>5</sub>Cl, 3 mS cm<sup>-1</sup>) does not penetrate the Si-C void structure resulting in less side reactions and higher initial coulombic efficiency compared to a liquid electrolyte (72.7 % vs. 31.0 %). Investigating the influence of balancing of full cells using 3-electrode ASSB cells revealed a higher delithiation of the cathode as a result of the higher cut-off voltage of the anode at high n/p ratios. During galvanostatic cycling, full cells with either a low or rather high overbalancing of the anode showed the highest capacity retention of up to 87.7 % after 50 cycles. </p>

FLUX SYNTHESIS OF Na0.44MnO2 NANORIBBONS AND THEIR ELECTROCHEMICAL PROPERTIES FOR Na-ION BATTERIES

2013 ◽  
Vol 06 (02) ◽  
pp. 1350012 ◽  
Author(s):  
LIWEI ZHAO ◽  
JIANGFENG NI ◽  
HAIBO WANG ◽  
LIJUN GAO
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Impedance Spectroscopy ◽  
Electrochemical Properties ◽  
Electrochemical Impedance ◽  
High Capacity ◽  
Rate Capability ◽  
Cycling Performance ◽  
Capacity Retention ◽  
Flux Synthesis ◽  
Promising Electrode Material

Well-crystallized Na0.44MnO2 is readily synthesized via a facile NaCl -flux reaction at 850°C for 5 h. The Na0.44MnO2 material exhibits a well-defined nanoribbon structure with dimension of 50–100 nm in thickness and 200–500 nm in width. Electrochemical properties of as-prepared Na0.44MnO2 are thoroughly investigated on assembled nonaqueous Na0.44MnO2 // Na cells using cyclic voltammetry, galvanostatic test, and electrochemical impedance spectroscopy. The results show that the Na0.44MnO2 nanoribbon material can deliver a high capacity of 106 mAh g-1 with stable cycling performance over 40 cycles. In addition, it exhibits a favorable rate capability, delivering a capacity of 90 mAh g-1 at a rate of 1 C. The high capacity retention combined with acceptable rate capability makes the Na0.44MnO2 a promising electrode material for advanced Na -ion batteries.

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