Chemical Overcharge and Overdischarge Protection for Lithium-Ion Batteries

Chen, Jun; Buhrmester, Claudia; Dahn, J. R.

doi:10.1149/1.1836119

Cited by 166 publications

(177 citation statements)

References 14 publications

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“…Consequently, TPA is less suitable for the investigation of graphite composite electrodes. Since the relative stability of TMP as a redox shuttle is unknown 17 and DBDMB has already been identified as one of the most stable redox shuttles so far, 14,[28][29][30] DBDMB was chosen for further experiments. Indeed, continuous SECM experimentation by using DBDMB as a redox mediator without microelectrode regeneration was recently reported for 145 h 15 and has meanwhile been extended to 670 h under favorable circumstances.…”

Section: Resultsmentioning

confidence: 99%

In Situ Quantification of the Swelling of Graphite Composite Electrodes by Scanning Electrochemical Microscopy

Bülter

Peters

Schwenzel

et al. 2015

J. Electrochem. Soc.

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The physical swelling of uncharged graphite composite electrodes due to electrolyte-binder interactions is investigated by scanning electrochemical microscopy (SECM) using 2,5-di-tert-butyl-1,4,-dimethoxybenzene as a redox mediator. A series of approach curves at the same location is conducted in order to quantify in situ and locally the physical swelling. The film thickness change δ film amounted to 9.1 μm on average for a 80 μm thick uncharged graphite composite electrode in LP40 electrolyte between 1.1 and 5.9 h. Curves of δ film vs. t usually reach a saturation within 12 h. The swelling ratio χ varies from 0.3% to 17.6% for uncharged graphite composite electrodes from the same batch in the same electrolyte. In contrast, the 8 μm thick polyvinylidene fluoride (PVDF) model sample swelled by χ = 99%. Approach curves demonstrate that swelling of the PVDF is the main cause for the physical swelling of uncharged graphite composite electrodes. Both PVDF model sample and uncharged graphite composite electrodes show locally different swelling ratios by SECM imaging. Based on these results a swelling model is proposed, where the uncharged graphite composite electrode swells physically on average by at least χ = 11% and the local topography is changing during swelling. Li-ion batteries (LIBs) are currently the most rapidly developing commercial rechargeable batteries. They are mainly used for portable electronics but increasingly find application for electrified vehicles and stationary storage applications because of the high practical energy density, good cyclability and low self-discharge.

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Section: Resultsmentioning

confidence: 99%

In Situ Quantification of the Swelling of Graphite Composite Electrodes by Scanning Electrochemical Microscopy

Bülter

Peters

Schwenzel

et al. 2015

J. Electrochem. Soc.

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show abstract

“…17,18 Among them 2,5-di-tert-butyl-1,4-dimethoxybenzene (later termed DDB) (10 in Figure 2) stood out as having excellent overcharge protection performance. DDB is electrochemically reversible at 3.9 V vs. Li/Li + and can provide over 300 cycles of 100% overcharge per cycle for lithium-ion cells with LiFePO 4 as the cathode.…”

Section: Brief Historymentioning

confidence: 99%

“…DDB is electrochemically reversible at 3.9 V vs. Li/Li + and can provide over 300 cycles of 100% overcharge per cycle for lithium-ion cells with LiFePO 4 as the cathode. The DDB was evaluated to confirm its superior performance in terms of high-rate overcharge protection 19 and overdischarge protection, 17 and a theoretical and mechanistic analysis for its high stability was also conducted. 18,20,21 Dahn's group later discovered another two stable redox shuttle systems, which are phenothiazine derivatives (12 in Figure 2) and 2,2,6,6-tetramethylpiperinyloxide (TEMPO) (11 in Figure 2) derivatives.…”

Section: Brief Historymentioning

confidence: 99%

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Redox Shuttle Additives for Lithium-Ion Battery

Zhang¹,

Zhang²,

Amine³

2012

Lithium Ion Batteries - New Developments

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“…In (Chen et al, 2005) it is pointed out that a chemical redox shuttle additive to the electrolyte is shown to provide overcharge protection. The molecule 2, 5 diterbutyl-1, 4-dimethoxy benzene, provides overcharge and overdischarge protection for hundreds of charge-discharge cycles in both single cells and series connected cells.…”

Section: Redox Shuttlementioning

confidence: 99%