Direct evidence on anomalous expansion of graphite-negative electrodes on first charge by dilatometry

Matoba, Naoki; Sawai, Keijiro

doi:10.1016/s0378-7753(01)00590-0

Cited by 86 publications

(52 citation statements)

References 9 publications

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“…1). Related set-ups were used by Biberacher et al [12], Besenhard et al [13], Winter et al [14], and Ohzuku et al [15]. Basically the dilatometer consists of a cell stack, i.e.…”

Section: Introductionmentioning

confidence: 99%

Carbon based double layer capacitors with aprotic electrolyte solutions: the possible role of intercalation/insertion processes

et al. 2005

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“…1). Related set-ups were used by Biberacher et al [12], Besenhard et al [13], Winter et al [14], and Ohzuku et al [15]. Basically the dilatometer consists of a cell stack, i.e.…”

Section: Introductionmentioning

confidence: 99%

Carbon based double layer capacitors with aprotic electrolyte solutions: the possible role of intercalation/insertion processes

et al. 2005

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“…18 The common point of these reports is the limiting of the volume-change investigation to a single electrode. Because the cell-volume change is a result of volume change in both the cathode and anode, it is more important to evaluate the cell behavior.…”

mentioning

confidence: 99%

Understanding Volume Change in Lithium-Ion Cells during Charging and Discharging Using In Situ Measurements

Wang

Sone

Segami

et al. 2007

J. Electrochem. Soc.

101

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Because structural change in lithium cobalt oxide ͑LiCoO 2 ͒ cathode is primarily responsible for the performance degradation of lithium-ion cells in simulated satellite operation, it is important to investigate the operating-condition effect on cell-volume change. In this work, we used in situ strain-gauge measurement to probe the total volume change during charging and discharging of five 50 Ah-class lithium-ion cells with graphite anodes and LiCoO 2 cathodes. Some interesting phenomena concerning the correlation of the taper voltage with the strain change at the end of the charge were found in the strain trend curve. To explain these phenomena, we examined the strain change of a commercial 0.65 Ah-class lithium-ion polymer cell with the same electrodes as a function of taper voltage by using in situ load-cell measurement and were able to deduce that the cell-volume change during charging correlated to the structure transition of the LiCoO 2 cathode from the initial hexagonal phase ͑H1͒ to a new hexagonal phase ͑H2͒ at a taper voltage near 4.00 V. We conclude that the taper voltage should be maintained below 4.00 V to maximize the cycle life of lithium-ion cells with graphite anodes and LiCoO 2 cathodes during practical satellite operation. In a spacecraft, the battery system is one of the most massive onboard components.1,2 Improvement in the energy density of the onboard battery system can help realize a lightweight power storage device, and hence contribute to lower launch costs and enable missions that have critical weight and/or volume margins. The specific advantages of lithium-ion technology offer the possibility of huge reductions in battery mass. It has been reported that over 20 spacecraft with onboard lithium-ion batteries have been launched in recent years.3-9 These spacecraft, including satellites, Mars rovers, and space vehicles, demonstrate the normal operation of onboard lithium-ion batteries in a space environment.A lithium-ion battery in a spacecraft generally consists of many lithium-ion cells connected in series and parallel to meet the power requirements of the bus and the mission. These cells cycle under various operating conditions and environments, such as ultrahigh vacuum states, radiation, long cycle-life requirements, and short charge and discharge intervals limited strictly by the spacecraft orbit.10 Typically, a spacecraft in low Earth orbit ͑LEO, within 1000 km of the Earth͒ periodically experiences about 60 min of sunshine and 30 min of eclipse. This requires that the onboard rechargeable cells store power derived from solar cells over short intervals of 60 min, and that they generate enough power to meet the electrical demands of the bus and the mission at a very short interval of 30 min. Additionally, the onboard rechargeable cells must operate without interruption for more than 30000 cycles to meet the general LEO mission life requirement of 5 years. To facilitate the application of lithium-ion cells in a spacecraft, these cells must be cycled under moderate conditions, such a...

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“…5,6 Ohzuku et al reported that a SiO x /C composite had a large capacity higher than 700 mAh g ¹1 and showed good capacity retention (600 mAh g ¹1 ) after 200 cycles. 7 However, SiO x has a large irreversible capacity in the first cycle owing to the reduction of SiO 2 in the vicinity of Si nanoparticles in the matrix to form lithium silicates such as Li 2 …”

Section: ¹1mentioning

confidence: 99%

Silicon Nano-flake Powder as an Anode for The Next Generation Lithium-ion Batteries: Current Status and Challenges

et al. 2017

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Silicon is electrochemically alloyed and de-alloyed with Li at potentials close to Li + /Li and is widely recognized as the most promising candidate for the anode of LIBs with a high energy density (250-300 Wh kg −1 ) in the next generation. The most serious issue of Si anode is poor capacity retention owing to large volume changes during charging and discharging. We developed Si LeafPowder ® with a nano-flake structure to overcome the poor capacity retention. However Si anodes still have some problems such as large irreversible capacity, ceaseless electrolyte decomposition, swelling of the electrode, etc. for use in high-energy density LIBs in the next generation. In this article, these problems and the challenges to mitigate them are overviewed based on our resent data obtained by Si nano-flakes (Si LeafPowder ® ).

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Direct evidence on anomalous expansion of graphite-negative electrodes on first charge by dilatometry

Cited by 86 publications

References 9 publications

Carbon based double layer capacitors with aprotic electrolyte solutions: the possible role of intercalation/insertion processes

Carbon based double layer capacitors with aprotic electrolyte solutions: the possible role of intercalation/insertion processes

Understanding Volume Change in Lithium-Ion Cells during Charging and Discharging Using In Situ Measurements

Silicon Nano-flake Powder as an Anode for The Next Generation Lithium-ion Batteries: Current Status and Challenges

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