Effect of electrolyte additives on high-temperature cycling performance of spinel LiMn2O4 cathode

Wang, Shuangcai; Hu, Huiping; Yu, Peifeng; Hua, Yang; Cai, Xinhui; Wang, Xianglian

doi:10.1007/s10800-018-1244-9

Cited by 23 publications

(16 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, on the surface of LiCoO 2 cycled with SN‐LiDFOB, there are strong signals belonging to the decomposition products (B–F, 685.85 eV, BF 3 686.77 eV) of LiDFOB. [ 16 ] In comparison, a much stronger characteristic peak of LiF (685 eV) and weaker signals belonging to other decomposition products (B–F, BF 3 ) of LiDFOB and PVDF appear on the surface of LiCoO 2 cathode cycled with PSL53. This phenomenon manifests that LiF, a beneficial component of the stable passivation layer for high‐voltage cathodes, [ 17 ] is more likely to form on the surface of cathode when cycled with PSL53.…”

Section: Figurementioning

confidence: 99%

LiDFOB Initiated In Situ Polymerization of Novel Eutectic Solution Enables Room‐Temperature Solid Lithium Metal Batteries

et al. 2020

View full text Add to dashboard Cite

It is demonstrated that a novel eutectic solution including 1,3,5-trioxane (TXE) and succinonitrile (SN) can be converted into solid-state polymer electrolyte (SPE) via in situ polymerization triggered by lithium difluoro(oxalato)borate (LiDFOB). It is worth noting that all the precursors (LiDFOB, TXE, and SN) of this novel SPE are totally solid and nonvolatile at room temperature, where, LiDFOB works as a lithium salt and an initiator simultaneously to avoid the introduction of impurity. It is noted that such SPE presents a considerable ionic conductivity of 1.14 × 10 −4 S cm −1 and a sufficiently wide electrochemical window of 4.5 V, which is significant for supporting the high-energy lithium batteries. In addition, this dedicatedly designed in situ polymerization is powerful to build kinetically favorable polymer-based protective layers on LiCoO 2 cathode and Li metal anode simultaneously, guaranteeing outstanding cycling stability (capacity retention of 88% after 200 cycles) of 4.3 V LiCoO 2 /lithium metal batteries at room temperature. More intriguingly, soft packed LiCoO 2 /SPE/Li metal batteries can still light a blue light emitting diode (LED) under the harsh conditions of being bent, cut, and stroked by a hammer, demonstrating excellent safety characteristics.

show abstract

Section: Figurementioning

confidence: 99%

LiDFOB Initiated In Situ Polymerization of Novel Eutectic Solution Enables Room‐Temperature Solid Lithium Metal Batteries

et al. 2020

View full text Add to dashboard Cite

show abstract

“…According to the O 1s spectrum (Figure b), the peaks around 523.21 eV confirm the existence of C–O and CO bonds, and the peak at 530.02 eV represents reactive oxygen species (−CO 3 /–OH) . As shown in Figure c, the B 1s signal peak at 191.94 eV is belongs to the product of the BOB – decomposition of cross-link boron-containing polymers via the decomposition path shown in Figure e. , Besides, the XPS spectra of Al 2p is shown in Figure d. The Al 2p 3/2 peak located at 74.51 eV means that the valence state of Al is +3 .…”

Section: Results and Discussionmentioning

confidence: 90%

“…21 As shown in Figure 4c, the B 1s signal peak at 191.94 eV is belongs to the product of the BOB − decomposition of cross-link boron-containing polymers via the decomposition path shown in Figure 4e. 22,23 Besides, the XPS spectra of Al 2p is shown in Figure 4d. The Al 2p 3/2 peak located at 74.51 eV means that the valence state of Al is +3.…”

Section: Resultsmentioning

confidence: 99%

Simultaneously Dual Modification of a Ternary Cathode Material by Aluminum Bis(oxalato)borate-Based Electrolyte

Wang

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Poor cycle performance is the critical challenge for commercialization application of layered LiNi x Co y Mn z O 2 (x + y + z = 1) cathode materials. Herein, the optimized LiNi 0.493 Co 0.214 Mn 0.293 O 2 (Al-LNCM) is modified by Al 3+ doping and passivation-film coating via the previous cycles using aluminum bis(oxalato)borate (Al(BOB) 3 )-based electrolyte. Results show that the electrochemical performance of Al-LNCM is significantly improved after dual modification, especially for the cycling and rate performances. On one hand, Al 3+ doping maintains the layered structure stability and suppresses the degree of Li + /Ni 2+ cation mixing, thereby inhibiting structural degradation and facilitating the transport of Li + ions. On the other hand, the prior formation of the Al-and Bcontaining surface coating can block the direct contact between the electrode and the electrolyte, which inhibits excessive electrolyte decomposition and undesirable interface side reactions.

show abstract

“…However, the peaks intensity of electrode in liquid electrolyte significantly reduced, indicating the loss of active LMO, which may be caused by the side reaction and results in battery failure. The SEM images of the unreacted electrode plates, the cycled electrode in solid state electrolyte and liquid electrolyte at 80 °C are displayed as shown in figure d, 4e, 4 f. From the images we can see that the surface of LMO cycled in the solid state electrolyte after cycling at 80 °C is smooth, while the surface of the LMO cycled in liquid electrolyte turns rough and many fluffy particles are observed, which may be caused by the side reaction between high oxidative LMO cathode and liquid electrolyte . To further conducted the surface chemistry changes of LMO electrode, the XPS of LMO before cycling, after cycling in solid state electrolyte and liquid electrolyte at 80 °C are shown in figure g, 4 h and 4i, respectively.…”

Section: Resultsmentioning

confidence: 99%

High Voltage, Flexible and Low Cost All‐Solid‐State Lithium Metal Batteries with a Wide Working Temperature Range

Zhang

Fei

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

In this work, a flexible 4 V all-solid-state lithium metal battery is reported. In this battery, polyvinylidene fluoride (PVDF)/ Li 6.40 La 3 Zr 1.40 Ta 0.60 O 12 (LLZTO) composite electrolyte is used as the electrolyte and low cost LiMn 2 O 4 (LMO) is used as the cathode. It is found that this all-solid-state battery can work from room temperature to 80°C. At 80°C, a capacity retention of 78.8% is obtained after 50 cycles while battery with liquid electrolyte last only one cycle. Further researches discover that liquid electrolyte react continuously with LMO while the solidstate electrolyte is stable with LMO at high temperature. These results may be useful for the developing of low cost, high energy and high safety batteries system.

show abstract

Effect of electrolyte additives on high-temperature cycling performance of spinel LiMn2O4 cathode

Cited by 23 publications

References 19 publications

LiDFOB Initiated In Situ Polymerization of Novel Eutectic Solution Enables Room‐Temperature Solid Lithium Metal Batteries

LiDFOB Initiated In Situ Polymerization of Novel Eutectic Solution Enables Room‐Temperature Solid Lithium Metal Batteries

Simultaneously Dual Modification of a Ternary Cathode Material by Aluminum Bis(oxalato)borate-Based Electrolyte

High Voltage, Flexible and Low Cost All‐Solid‐State Lithium Metal Batteries with a Wide Working Temperature Range

Contact Info

Product

Resources

About