A new SiO/C anode composition for lithium-ion battery

Doh, Chil‐Hoon; Park, Chul-Wan; Shin, Hyeon–Ok; Kim, Dong-Hun; Chung, Young-Dong; Moon, Seong‐In; Jin, Bong‐Soo; Kim, Hyunsoo; Veluchamy, A.

doi:10.1016/j.jpowsour.2007.12.074

Cited by 103 publications

(39 citation statements)

References 18 publications

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“…However, SiO x is used in a blended form with graphite, but its content is typically less than 5 wt%, which reflects the infancy of Si anode technology. The main challenge associated with SiO x is its poor initial Coulombic efficiency (ICE), which reaches only 50-60% 45 without a carbon surface coating. This low efficiency leads to an excessive loading of the cathode material and, therefore, to a sacrifice in the energy density of the entire cell.…”

Section: Near-term Technologiesmentioning

confidence: 99%

Promise and reality of post-lithium-ion batteries with high energy densities

2016

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What characteristics define a good rechargeable battery? Although properties such as rate capability, cost, cycle life and temperature tolerance must be taken into consideration in any evaluation of a rechargeable battery 1,2 , it is the improvement in energy density that has primarily driven the overall technological progress over the past 150 years -from lead-acid cells in the 1850s, nickelcadmium cells in the 1890s and nickel metal hydride cells in the 1960s to, finally, lithium-ion batteries (LIBs) in the present day.In the current era of LIBs, there is an ever-growing demand for even higher energy densities to power mobile IT devices with increased power consumption and to extend the driving range of electric vehicles. The growth of the global electric vehicle market has been slower than initially predicted about 5 years ago 3 , which reflects the challenge that the battery industry faces: customers react very sensitively to the driving range (and thus the energy density) and price of electric vehicles. Because the energy density of a rechargeable battery is determined mainly by the specific capacities and operating voltages of the anode and the cathode, active materials have been the main focus of research in recent years. Other cell components, including separators, binders, outer cases and, to some extent, the major components of the electrolyte solution (that is, solvent and salt), have little room for further improvement. In other words, a dramatic increase in the energy density requires new redox chemistries between charge-carrier ions and host materials beyond the conventional 'intercalation' mechanisms 4 . Intercalationbased materials have a relatively small number of crystallographic sites for storing charge-carrier ions, leading to limited energy densities. For this reason, the electrodes that operate on the basis of distinct solid-state reactions, such as alloying and conversion, or that use gas-phase reactants have encountered growing interest owing to the likelihood that they will surpass the energy densities of intercalation-based electrodes.New chemistries for charge-carrier ion storage serve as the basis for 'beyond intercalation' or so-called postLIBs 5-7 . The systems governed by these new chemistries offer higher theoretical energy densities, and this benefit is usually translated to, at least, the initial cycles in experimental testing. It is becoming increasingly evident that the short lifetime is a serious problem of post-LIB systems. Indeed, the main technological challenge associated with these systems is overcoming their inferior reversibility. The main factors responsible for the low reversibility are instabilities during the phase transition of active materials and/or uncontrolled reactions at the electrode/electrolyte interface 8 ; this implies that the electrode structures and electrolyte solutions should be developed and optimized as integrated systems to enable the realization of post-LIBs.In this Review, we discuss a wide range of promising post-LIBs, focusing on their advant...

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Section: Near-term Technologiesmentioning

confidence: 99%

Promise and reality of post-lithium-ion batteries with high energy densities

2016

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“…Doh et al have found that SiO-C composite, synthesized through directly ball milling of SiO and graphite powders, delivers a reversible charge capacity of 688 mA h g À1 at 30 cycles [10]. This demonstrates that the addition of graphite greatly improves the electrochemical performance of SiO.…”

Section: Introductionmentioning

confidence: 98%

Insights into the conversion behavior of SiO-C hybrid with pre-treated graphite as anodes for Li-ion batteries

Liang

et al. 2016

Electrochimica Acta

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“…Використання кремнійвмісних композиційних елект-родних матеріалів в ЛДС описано у нашій оглядовій роботі [15]. Альтернативними матеріалами, які здатні замінити вуглець у ЛДС, є широко досліджувані в останнє десятиліття оксиди кремнію SiO [16], SiO x [17] або оксиди кремнію в поєднанні з іншими матеріалами: SiO-Si [18], SiO -метал [19], SiO -C [20][21][22][23]. Композиційні електродні матеріали на основі діоксиду кремнію вивчені недостатньо.…”

Section: вступunclassified

The Current Formation Processes in Lithium Power Sources with SiO2 – C Composite Cathode

Myronyuk

Sachko

Mandzyuk

2015

PCSS

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Струмоутворюючі процеси в літієвих джерелах струму з композиційним катодом SiO 2 -C ДВНЗ "Прикарпатський національний університет імені Василя Стефаника", вул. Шевченка, 57, Івано-Франківськ, 76018, Україна, mandzyuk_vova@ukr.net У роботі, використовуючи методи гальваностатичного циклювання, циклічної вольтамперометрії та імпедансної спектроскопії, досліджений процес струмоутворення в літієвому джерелі струму (ЛДС) з композиційним катодом SiO 2 -22% C. Встановлено, що при розрядженні джерела в режимі С/20 його питома ємність становить 1757 мА•год/г. У циклах розрядження/зарядження ЛДС відбувається різкий спад питомої ємності (необоротна ємність після першого циклу перевищує 95 %) внаслідок утворення поверхневого твердотільного шару складу (ПТШ) складу LiF та сполуки Li х SiO 2 , в якій літій при зарядженні джерела не окислюється до йонного стану. З'ясовано, що впровадження в катодний матеріал йонів літію до значення х = 1,8 зумовлює зменшення їх коефіцієнта дифузії на 4 порядки (D Li = 2,2•10 -14 ÷ 2,1•10 -18 см 2 /с).Ключові слова: композит SiO 2 -C, літієве джерело струму, питома ємність, коефіцієнт дифузії.Стаття поступила до редакції 08.03.2015; прийнята до друку 15.06.2015.

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A new SiO/C anode composition for lithium-ion battery

Cited by 103 publications

References 18 publications

Promise and reality of post-lithium-ion batteries with high energy densities

Promise and reality of post-lithium-ion batteries with high energy densities

Insights into the conversion behavior of SiO-C hybrid with pre-treated graphite as anodes for Li-ion batteries

The Current Formation Processes in Lithium Power Sources with SiO2 – C Composite Cathode

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