Magnetic Compton Scattering Study of Li-Rich Battery Materials

The redox process in a lithium-ion battery occurs when a conduction electron from the lithium anode is transferred to the redox orbital of the cathode. Understanding the nature of orbitals involved in anionic as well as cationic redox reactions is important for improving the capacity and energy density of Li-ion batteries. In this connection, we have obtained magnetic Compton profiles (MCPs) from the Li-rich cation-disordered rock-salt compound LixTi0.4Mn0.4O2 (LTMO). The MCPs, which involved the scattering of circularly polarized hard X-rays, are given by the momentum density of all the unpaired spins in the material. The net magnetic moment in the ground state can be extracted from the area under the MCP, along with a SQUID measurement. Our analysis gives insight into the role of Mn 3d magnetic electrons and O 2p holes in the magnetic redox properties of LTMO.

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Derating Guidelines for Lithium-Ion Batteries

Energies ◽

10.3390/en11123295 ◽

2018 ◽

Vol 11 (12) ◽

pp. 3295 ◽

Cited By ~ 3

Author(s):

Yongquan Sun ◽

Saurabh Saxena ◽

Michael Pecht

Keyword(s):

Lithium Ion ◽

Stress Factors ◽

Li Ion Batteries ◽

Degradation Data ◽

Capacity Loss ◽

Battery Capacity ◽

Operational Life ◽

Battery Degradation ◽

Li Ion

Derating is widely applied to electronic components and products to ensure or extend their operational life for the targeted application. However, there are currently no derating guidelines for Li-ion batteries. This paper presents derating methodology and guidelines for Li-ion batteries using temperature, discharge C-rate, charge C-rate, charge cut-off current, charge cut-off voltage, and state of charge (SOC) stress factors to reduce the rate of capacity loss and extend battery calendar life and cycle life. Experimental battery degradation data from our testing and the literature have been reviewed to demonstrate the role of stress factors in battery degradation and derating for two widely used Li-ion batteries: graphite/LiCoO2 (LCO) and graphite/LiFePO4 (LFP). Derating factors have been computed based on the battery capacity loss to quantitatively evaluate the derating effects of the stress factors and identify the significant factors for battery derating.

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Sulfurization synthesis of a new anode material for Li-ion batteries: understanding the role of sulfurization in lithium ion conversion reactions and promoting lithium storage performance

Journal of Materials Chemistry A ◽

10.1039/c9ta08394d ◽

2019 ◽

Vol 7 (37) ◽

pp. 21270-21279 ◽

Cited By ~ 1

Author(s):

Yanmin Qin ◽

Zhongqing Jiang ◽

Liping Guo ◽

Jianlin Huang ◽

Zhong-Jie Jiang ◽

...

Keyword(s):

Anode Material ◽

High Capacity ◽

Lithium Ion ◽

Li Ion Batteries ◽

Lithium Storage ◽

Storage Performance ◽

Carbon Coated ◽

Li Ion ◽

Good Cycling Stability

N, S co-doped carbon coated MnOS (MnOS@NSC) has been demonstrated to be a potential anode material for LIBs with high capacity, good cycling stability and excellent rate performance.

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Direct X-Ray Imaging as a Tool for Understanding Multiphysics Phenomena in Energy Storage

Journal of Electrochemical Energy Conversion and Storage ◽

10.1115/1.4034415 ◽

2016 ◽

Vol 13 (3) ◽

Cited By ~ 3

Author(s):

George J. Nelson ◽

Zachary K. van Zandt ◽

Piyush D. Jibhakate

Keyword(s):

Energy Storage ◽

Lithium Ion ◽

Ex Situ ◽

Storage Device ◽

Li Ion Batteries ◽

X Ray ◽

X Ray Imaging ◽

Wide Range ◽

Li Ion ◽

Insight Into

The lithium-ion battery (LIB) has emerged as a key energy storage device for a wide range of applications, from consumer electronics to transportation. While LIBs have made key advancements in these areas, limitations remain for Li-ion batteries with respect to affordability, performance, and reliability. These challenges have encouraged the exploration for more advanced materials and novel chemistries to mitigate these limitations. The continued development of Li-ion and other advanced batteries is an inherently multiscale problem that couples electrochemistry, transport phenomena, mechanics, microstructural morphology, and device architecture. Observing the internal structure of batteries, both ex situ and during operation, provides a critical capability for further advancement of energy storage technology. X-ray imaging has been implemented to provide further insight into the mechanisms governing Li-ion batteries through several 2D and 3D techniques. Ex situ imaging has yielded microstructural data from both anode and cathode materials, providing insight into mesoscale structure and composition. Furthermore, since X-ray imaging is a nondestructive process studies have been conducted in situ and in operando to observe the mechanisms of operation as they occur. Data obtained with these methods has also been integrated into multiphysics models to predict and analyze electrode behavior. The following paper provides a brief review of X-ray imaging work related to Li-ion batteries and the opportunities these methods provide for the direct observation and analysis of the multiphysics behavior of battery materials.

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Role of ligands in the stability of BnXn and CBn−1Xn (n = 5–10; X = H, F, CN) and their potential as building blocks of electrolytes in lithium ion batteries

Physical Chemistry Chemical Physics ◽

10.1039/c7cp02642k ◽

2017 ◽

Vol 19 (27) ◽

pp. 17937-17943 ◽

Cited By ~ 14

Author(s):

MingMin Zhong ◽

Jian Zhou ◽

Hong Fang ◽

Puru Jena

Keyword(s):

Lithium Ion Batteries ◽

High Performance ◽

Lithium Ion ◽

Building Blocks ◽

Li Ion Batteries ◽

Li Ion ◽

The Stability

We predict a series of boron-cage-based stable (di-)anions, and demonstrate them to be high-performance electrolytes in Li-ion batteries.

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Molecular Insight into the Structure and Dynamics of LiTf2N/Deep Eutectic Solvent: An Electrolyte for Li-ion Batteries

10.26434/chemrxiv.14381963.v1 ◽

2021 ◽

Author(s):

kishant kumar ◽

Anand Bharti ◽

Rudra Kumar

Keyword(s):

Molecular Dynamics ◽

Molecular Dynamics Simulation ◽

Deep Eutectic Solvent ◽

Lithium Ion ◽

Dynamics Simulation ◽

Metal Extraction ◽

Li Ion Batteries ◽

Structure And Dynamics ◽

Li Ion ◽

Insight Into

Two choline based deep eutectic solvent namely ethaline and glyceline have been used in different applications such as metal extraction, solubility and in electrochemistry because of its easy availability, inexpensive and non-toxic nature. In this work, molecular dynamics simulation was employed to study the structural and transport properties of ethaline and glyceline when blended with Li+ based salt (Lithium Bis (trifluoromethane sulfonyl) imide (LiTf2N)) in varying concentration for the application as electrolytes in lithium ion batteries.

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Effect of carbon content on the structure and electronic properties of silicon oxycarbide anodes for lithium-ion batteries: a first-principles study

Journal of Materials Chemistry A ◽

10.1039/c4ta06932c ◽

2015 ◽

Vol 3 (9) ◽

pp. 5067-5071 ◽

Cited By ~ 49

Author(s):

Ningbo Liao ◽

Beirong Zheng ◽

Hongming Zhou ◽

Wei Xue

Keyword(s):

Carbon Content ◽

Lithium Ion Batteries ◽

Electronic Properties ◽

Anode Material ◽

First Principles ◽

Lithium Ion ◽

Silicon Oxycarbide ◽

Li Ion Batteries ◽

Li Ion ◽

Insight Into

Silicon oxycarbide (SiCO) shows a three times larger lithium capacity than does graphite. This work provides an insight into the lithiation mechanism of SiCO as anode material for Li-ion batteries.

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The Role of Sei in Lithium and Lithium Ion Batteries

MRS Proceedings ◽

10.1557/proc-393-209 ◽

1995 ◽

Vol 393 ◽

Cited By ~ 18

Author(s):

E. Peled ◽

D. Golodnttsky ◽

G. Ardel ◽

C. Menachem ◽

D. Bar Tow ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Lithium Ion ◽

Surface Modifications ◽

Li Ion Batteries ◽

Carbonaceous Materials ◽

Electrode Degradation ◽

Gel Electrolytes ◽

Micro Channels ◽

Li Ion

ABSTRACTThis paper presents and discusses fundamental processes taking place at the lithium and LixC6 electrode/electrolyte interphases and models for these interphases. We deal with both nonaqueous and polymer (dry and gel) electrolytes, graphitized and nongraphitized carbonaceous materials as anodes for Li-ion batteries. Each electrode/electrolyte combination has its own unique features and problems but there are some general phenomena common to all of them. Issues to be reviewed include SEI composition, morphology and formation reactions, graphite surface modifications including chemical bonded SEI and micro channels formation, electrode degradation processes, lithium deposition-dissolution and intercalation-deintercalation mechanisms, rate-determining steps (RDS), electrolyte and electrode parameters and conditions affecting the above mentioned processes. Technologyrelated issues are emphasized.

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