Analysis of aging of commercial composite metal oxide – Li 4 Ti 5 O 12 battery cells

Svens, Pontus; Eriksson, Rickard; Hansson, J. N.; Behm, Mårten; Gustafsson, Torbjörn; Lindbergh, Göran

doi:10.1016/j.jpowsour.2014.07.050

Cited by 42 publications

(24 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, nanostructures can improve the intercalation kinetics by providing a larger electrode/electrolyte contact area. Another way to improve rate performance of Li 4 Ti 5 O 12 materials is to coat conductive species including Ag [21], carbon [22][23][24][25], metal oxides [26,27] and fluorides [28] on the surface of Li 4 Ti 5 O 12 particles. Those conductive materials can enhance the electron transfer on the surface and improve the rate performance of Li 4 Ti 5 O 12 .…”

Section: Introductionmentioning

confidence: 99%

Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Zhou

Feng

Guo

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Zhou

Feng

Guo

et al. 2015

Electrochimica Acta

View full text Add to dashboard Cite

“…This cell type has in a previous study [10] shown that loss of cell capacity mainly correlates to ageing of the positive electrode. The positive electrode contains LMO and LCO active material, which both have been investigated regarding ageing mechanisms in earlier studies [11][12][13][14].…”

Section: Differential Voltage Analysismentioning

confidence: 56%

“…This indicates presence of an ageing mechanism in the early stage of cycling that does not immediately result in capacity loss, possibly related to the composition of the electrode active material. A Scanning Electron Microscopy Energy Dispersive X-ray (SEM EDX)-analysis of fresh positive electrode material (not shown here, more information about the measurement setup can be found in our previous paper [10]) from a cell with the same specification as the tested cells but from a different batch, revealed a higher content of LMO than LCO. Since we in our previous paper [10] found that the LMO active material likely ages faster than the LCO, this could explain the change of ratio between the heights of the two peaks in the dV/dQ plots in Figure 5a,c.…”

Section: Differential Voltage Analysismentioning

confidence: 92%

“…Hence, dV/dQ analysis is a useful method for evaluating ageing of the positive electrode for this cell type. The dV/dQ analysis method has been described in our earlier work [10] and in other publications [17][18][19] and will not be discussed further here. A dV/dQ plot for this cell type has two peaks corresponding to phase changes in the positive electrode active material.…”

Section: Differential Voltage Analysismentioning

confidence: 99%

See 1 more Smart Citation

Lithium-Ion Battery Cell Cycling and Usage Analysis in a Heavy-Duty Truck Field Study

2015

Self Cite

View full text Add to dashboard Cite

This paper presents results from a field test performed on commercial power-optimized lithium-ion battery cells cycled on three heavy-duty trucks. The goal with this study was to age battery cells in a hybrid electric vehicle (HEV) environment and find suitable methods for identifying cell ageing. The battery cells were cycled on in-house developed equipment intended for testing on conventional vehicles by emulating an HEV environment. A hybrid strategy that allows battery usage to vary within certain limits depending on driving patterns was used. This concept allows unobtrusive and low-cost testing of battery cells under realistic conditions. Each truck was equipped with one cell cycling equipment and two battery cells. One cell per vehicle was cycled during the test period while a reference cell on each vehicle experienced the same environmental conditions without being cycled. Differential voltage analysis and electrochemical impedance spectroscopy were used to identify ageing of the tested battery cells. Analysis of driving patterns and battery usage was performed from collected vehicle data and battery cell data.

show abstract

“…119 The study of other anode materials such as Li 4 Ti 5 O 12 by SEM has so far not given precise information on the degradation mechanisms. 124 On the cathode side, often no changes are visible by SEM imaging between pristine and aged cathodes 16,40,125 (see lower part of Figure 7). When a visible surface film was reported after prolonged cycling on top of LiCoO 2 , it has not been possible to relate it with a clear degradation mechanism.…”

Section: 121mentioning

confidence: 99%

Review—Post-Mortem Analysis of Aged Lithium-Ion Batteries: Disassembly Methodology and Physico-Chemical Analysis Techniques

Waldmann

Iturrondobeitia

Kasper

et al. 2016

J. Electrochem. Soc.

235

149

View full text Add to dashboard Cite

Improvement of life-time is an important issue in the development of Li-ion batteries. Aging mechanisms limiting the life-time can efficiently be characterized by physico-chemical analysis of aged cells with a variety of complementary methods. This study reviews the state-of-the-art literature on Post-Mortem analysis of Li-ion cells, including disassembly methodology as well as physicochemical characterization methods for battery materials. A detailed scheme for Post-Mortem analysis is deduced from literature, including pre-inspection, conditions and safe environment for disassembly of cells, as well as separation and post-processing of components. Special attention is paid to the characterization of aged materials including anodes, cathodes, separators, and electrolyte. More specifically, microscopy, chemical methods sensitive to electrode surfaces or to electrode bulk, and electrolyte analysis are reviewed in detail. The techniques are complemented by electrochemical measurements using reconstruction methods for electrodes built into half and full cells with reference electrode. The changes happening to the materials during aging as well as abilities of the reviewed analysis methods to observe them are critically discussed. Li-ion batteries are currently used in everyday objects such as smart-phones, power tools and tablet computers as well as in the growing fields of light electric vehicles (LEVs), unmanned aerial vehicles (UAVs), battery electric vehicles (BEVs), hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). [1][2][3][4] Furthermore, the rise of renewable energy sources like wind and solar power, which are only intermittently available, demands reliable and highly flexible stationary energy storage solutions, which provide high capacities and predictable life-times. 2,5Aging of Li-ion batteries is a general problem for manufacturers as they have to guarantee long-term reliability of their products. For state-of-the-art cells, degradation effects on the material level lead to capacity fade and resistance increase on the cell level. The aging state of a battery is often characterized by the state-of-health (SOH) in % according to 3,16,22,[29][30][31] SO H(t) = discharge capacity (t) discharge capacity (t = 0)[1]where t represents the aging time. In general, one has to differentiate between cycling 7,16,18,21,[23][24][25]32 and calendar aging. 7,19,[21][22][23][24]27 Since commercial Li-ion cells can be subject to calendar aging in the time between manufacturing and delivery, it is good practice to measure the discharge capacity at t = 0 for each cell that undergoes an aging test. Since the discharge capacity depends mainly on temperature, depth-of-discharge (DOD), and discharge current, the SOH is usually monitored by regular check-ups with defined parameter sets, 7,16,21,23,24 which can vary depending on the application. Typically, a temperature of 25• C, 16,22,24 DOD of 100%, 16,21 and discharge rates of 1C 7,16,21,22,24 or lower 23 are used in check-ups. The performance dec...

show abstract

Analysis of aging of commercial composite metal oxide – Li 4 Ti 5 O 12 battery cells

Cited by 42 publications

References 43 publications

Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Solid-state synthesis and electrochemical performance of Ce-doped Li4Ti5O12 anode materials for lithium-ion batteries

Lithium-Ion Battery Cell Cycling and Usage Analysis in a Heavy-Duty Truck Field Study

Review—Post-Mortem Analysis of Aged Lithium-Ion Batteries: Disassembly Methodology and Physico-Chemical Analysis Techniques

Contact Info

Product

Resources

About