Surface layer formed on silicon thin-film electrode in lithium bis(oxalato) borate-based electrolyte

Choi, Nam‐Soon; Yew, Kyoung Han; Kim, Ho; Kim, Sung‐Soo; Choi, Wonchang

doi:10.1016/j.jpowsour.2007.07.058

Cited by 118 publications

(90 citation statements)

References 24 publications

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“…It forms porous globules surface film of varied sizes [12,27,28,70] on the graphite electrode with carbonate solvents. These SEI morphologies often function in various ways that prevent lithium ions consumption [99], reduce the electrical path into the graphite particles, and control total interfacial resistance [100,101].…”

Section: Morphology Of the Sei Layermentioning

confidence: 99%

The formation and stability of the solid electrolyte interface on the graphite anode

Agubra

Fergus

2014

Journal of Power Sources

427

314

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Section: Morphology Of the Sei Layermentioning

confidence: 99%

The formation and stability of the solid electrolyte interface on the graphite anode

Agubra

Fergus

2014

Journal of Power Sources

427

314

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“…85,86 Given the potential as well as the electron-poor characteristic of Si that are similar to graphite, single-electron reduction products from electrolyte solvents were also identified, which include inorganic species such as Li 2 CO 3 , LiF, and Li 2 O, and organic species such as alkylcarbonates, carboxylates, and polyethylene oxide. [71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86] What surprised the researchers is that CF x was also detected by XPS, which was not present on graphitic anode. It has been speculated that HF, produced due to the hydrolysis of PF 6 À -anion by trace moisture, attack on both Si and SiO 2 , and SiF 6 2À resulting from HF also catalyzes formation of CF x species.…”

Section: On Si and Other Alloy Surfacesmentioning

confidence: 99%

Interfacing electrolytes with electrodes in Li ion batteries

2011

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Aqui.Onde a terra termina e o mar j a não começa -A poetic definition of a binary liquid/solid interface by Lu ıs de Camões (1572). Since its birth in early 1990s, Li ion battery technology has been powering the rapid digitization of our daily life and finally made its debut in 2010 into the large format application for electrified vehicles such as the Nissan Leaf and GM Chevrolet Volt; however, much of the chemistry and processes underneath this amazing energy storage device still remain to be understood, among which is the interphase between electrolyte and electrodes. Interphases are formed in situ on electrode surfaces from sacrificial decomposition of electrolytes. Their ad hoc chemistry supports the reversible Li + -intercalation in both anode and cathode materials at extreme potentials, while preventing parasitic reductions/oxidations on the reactive surfaces of those electrodes; but their existence places restrictions on energy and power densities of the device by impeding Li + -transport and setting operating voltage limits, respectively. It has been the dream of battery engineers to maximize the former and minimize the latter. This review summarizes the most recent knowledge about the chemistry and formation mechanism of this elusive battery component on both anode and cathode surfaces. The attempts to tailor a desired interphasial chemistry via diversified means were also discussed.

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“…LiBOB-based electrolyte (0.7 M) can obviously improve the reversible capacity retention of silicon film and also lead to the formation of a stable surface layer with a less-porous structure. 153 Apart from electrolyte additives and lithium salts, some other strategies have been considered to alleviate the unstable silicon SEI in organic electrolyte. Cui et al reported that double-walled silicon nanotube structure design can have stable SEI and long cycle life.…”

Section: Technological Problemsmentioning

confidence: 99%

Review—Nano-Silicon/Carbon Composite Anode Materials Towards Practical Application for Next Generation Li-Ion Batteries

Luo

Liu

Zheng

et al. 2015

J. Electrochem. Soc.

308

186

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Among many candidates, silicon anode materials have been considered as one of the most promising materials for the next generation Li-ion batteries to replace widely used graphite anode materials, due to its high capacity, abundant source, environmental friendly and potential low cost. However, practical applications of silicon anode materials are still quite challenge due to large volume change and serious interfacial side reactions. Many strategies have been purposed and evaluated over last two decades. It seems that SiO x , Si-M alloy and nano-Si/C composite are more promising materials. In this review, scientific and technological problems and possible solutions of nano-Si/C composite anode for Li-ion batteries are summarized.Lithium-ion batteries have the advantages of high energy density, good rate capability, long cycle life, low self-discharge rate. [1][2][3][4] Since the first commercial application in the portable electronic devices market in 1991, 5 three generations of Li-ion batteries have been developed, as listed in Figure 1.The energy density of commercial Li-ion batteries has been improved from 90 Wh kg −1 to 245 Wh kg −1 . 6 (note: a prototype of 30 Ah Li-ion battery using Si-based anode material and Ni-riched cathode material achieved 330 Wh kg −1 , as claimed by Hitachi Chemical in November 18, 2014, Japanese Battery Symposium). The applications of lithium-ion batteries have been extended to many emerging markets, including electric bikes and vehicles, large scale energy storage, back-up power sources and power tools. 7 For most of applications, the energy densities of the advanced Li-ion batteries are still far from satisfactory. The calls for battery revolutionary have been heard every day.According to theoretical energy density calculations based on thermodynamic data, 6 the rechargeable batteries using metallic lithium as anode could achieve the highest energy densities for electrochemical energy storage devices, as shown in Figure 2. 8,9 Currently, metallic lithium anodes in nonaqueous batteries suffer from the formation of lithium dendrites and holes, growth of the instable solid electrolyte interphase (SEI) and exhaustion of electrolyte caused by the side reactions. Great efforts are needed to solve these problems. 10 In view of short term targets, it is more practical to develop the third generation Li-ion batteries, in which Si-based materials are used in anodes.Silicon is the most attractive choice as anode material in lithiumion batteries to replace graphite. It has a theoretical capacity of 4200 mAh g −1 for forming Li 22 Si 5 and 3580 mAh g −1 for forming Li 15 Si 4 , 11,12 which is 10 times higher than 350-365 mAh g −1 of commercial graphitic anode materials. Si is environmental friendly and has abundant source and low cost for precursors. However, after 20 years R&D, it is realized that the use of the high capacity Si-based anode materials is still very difficult in full Li-ion batteries. In this short review, the main scientific and technoligical problems of the nano-Si/C compo...

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Surface layer formed on silicon thin-film electrode in lithium bis(oxalato) borate-based electrolyte

Cited by 118 publications

References 24 publications

The formation and stability of the solid electrolyte interface on the graphite anode

The formation and stability of the solid electrolyte interface on the graphite anode

Interfacing electrolytes with electrodes in Li ion batteries

Review—Nano-Silicon/Carbon Composite Anode Materials Towards Practical Application for Next Generation Li-Ion Batteries

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