A Bifunctional Organic Redox Catalyst for Rechargeable Lithium–Oxygen Batteries with Enhanced Performances

Zhang, Jinqiang; Sun, Bing; Xie, Xiuqiang; Zhao, Yufei; Wang, Guoxiu

doi:10.1002/advs.201500285

Cited by 37 publications

(25 citation statements)

References 44 publications

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“…Some redox mediators, including 2,5‐di‐ tert ‐butyl‐1,4‐benzo‐quinone (DBBQ), Coenzyme Q10 (CoQ 10 ), iron phthalocyanine (FePc), 2‐phenyl‐4,4,5,5‐tetramethylimidazoline‐1‐oxyl‐3‐oxide (PTIO), poly(2,2,6,6‐tetramethylpiperidinyloxy‐4‐yl methacrylate) (PTMA), RuBr 3, and iron protoporphyrin (Fe(heme)), were also studied. These RMs promote the discharge performance in a different way compared to the redox‐shuttle mechanism by forming new complex intermediates to replace LiO 2 .…”

Section: Redox Mediators For Dischargementioning

confidence: 99%

“…The discharge capacity of the CoQ 10 ‐catalyzed cell was approximately 40–100 times higher than that of the uncatalyzed Li–O 2 cells . PTIO and PTMA, which are stable free radicals, were shown to operate as RMs similar to DBBQ . Xu et al.…”

Section: Redox Mediators For Dischargementioning

confidence: 99%

“…Attempts have been made to combine RM disch and RM char to solve both discharge and charge problems through a bifunctional RM . However, this is somewhat difficult.…”

Section: Bifunctional and Dual Rmsmentioning

confidence: 99%

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Promoting Li–O₂ Batteries With Redox Mediators

Shen

Zhang

et al. 2019

ChemSusChem

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Li–O2 batteries have a high theoretical specific energy, 3500 Wh kg−1; however, its practical capacity is far below this value and limited by the passivation with the insulating discharge product Li2O2. The nonconductive nature of Li2O2 also impedes the charging process, leading to a low coulombic efficiency and high overpotential on charge even at a moderate rate. To address these challenges, redox mediators could be used both during discharge and charge to transfer electrons between O2/electrode surface or Li2O2/electrode surface to overcome the passivation of Li2O2, which would facilitate the discharge and charge process. The capacity and current density were significantly improved using the redox mediators, thus representing a promising strategy to achieve a high energy density for Li–O2 batteries.

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Section: Redox Mediators For Dischargementioning

confidence: 99%

Section: Redox Mediators For Dischargementioning

confidence: 99%

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Promoting Li–O₂ Batteries With Redox Mediators

Shen

Zhang

et al. 2019

ChemSusChem

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“…The vibrationalb ands of CCÀHg roups at 2120 and 3290 cm À1 from alkyne monomers had nearly disappearedf rom the spectra of the TEMPO-POFs and the appearance of new CCv ibrations at 2200 cm À1 furtheri ndicated that the Sonogashira polycondensation had proceeded as planned. [22] 1 H-13 Cc ross-polarization magic angle-spinning (CP-MAS) solid-state NMR spectroscopyo ft he isopropyl-protected TEMPO-POF [23] showed chemical shifts at d = 85-95 and 110-151 ppm for both polymers ( corresponding to the carbon signals of internal alkyne and aromatic rings,r espectively,w hereas peaks at d = 20-35 ppm, corresponding to the methyl carbonsi nT EMPO, wered etected in both polymers. [22] 1 H-13 Cc ross-polarization magic angle-spinning (CP-MAS) solid-state NMR spectroscopyo ft he isopropyl-protected TEMPO-POF [23] showed chemical shifts at d = 85-95 and 110-151 ppm for both polymers ( corresponding to the carbon signals of internal alkyne and aromatic rings,r espectively,w hereas peaks at d = 20-35 ppm, corresponding to the methyl carbonsi nT EMPO, wered etected in both polymers.…”

Section: Resultsmentioning

confidence: 99%

Bottom‐Up Construction of Porous Organic Frameworks with Built‐In TEMPO as a Cathode for Lithium–Sulfur Batteries

Zhou

Zeng

et al. 2017

ChemSusChem

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Two redox-active porous organic frameworks (POFs) with a built-in radical moiety (TEMPO) and hierarchical porous structures were synthesized through a facile bottom-up strategy and studied as cathode materials for lithium-sulfur (Li-S) batteries. The sulfur loading in these two POFs reached 61 %, benefitting from their large pore volumes. Owing to the highly dense docking sites of TEMPO, sulfur could be covalently immobilized within the porous networks and efficiently inhibit the shuttle effect, thereby significantly improving the cycling performance. The composites TPE-TEMPO-POF-S (TPE=tetraphenylethene) deliver a capacity in excess of 470 mAh g after 200 cycles with a coulombic efficiency of around 100 % at a current rate of 0.1 C. Furthermore, TEMPO-POFs with sulfur embedded showed excellent rate capability with limited capacity loss at rates of 0.1-1 C.

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“…[89][90][91][92][93][94] The principle of LiO 2 batteries is simply based on the reversible reaction 2Li + + 2e − + O 2 Li 2 O 2 . [89][90][91][92][93][94] The principle of LiO 2 batteries is simply based on the reversible reaction 2Li + + 2e − + O 2 Li 2 O 2 .…”

Section: Rolled-up Nanotechnology For Lithium-o 2 Batteriesmentioning

confidence: 99%

Introducing Rolled‐Up Nanotechnology for Advanced Energy Storage Devices

Deng

Liu

et al. 2016

Advanced Energy Materials

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the aim to circumvent the intermittency of these dynamic resources and provide power supply on demand, energy storage systems that can effectively store the elec trical energy are strongly demanded. [5][6][7] Among numerous electrical energy storage (EES) devices available today, lithium batteries, capacitors, and super capacitors are particularly appealing owing to their large capabilities of storing energy with long service lifetime. [8,9] In recent years, with the rapid development of mate rial science and nanotechnology, energy storage devices with enhanced performance have been realized, [2,[6][7][8][9][10] and they have emerged as the dominant power sources for portable electronics in modern society. Despite the advances already achieved, per formance of these EES devices still needs to be further improved in order to meet the higher requirements of future systems, ranging from microelectrochemcial sys tems (MEMS) to electrical transportation systems like electric vehicles.The development of the electrode mate rials is essential for the improvement of high performance EES systems. [11,12] Noticeably, nanomateirals derived from rolledup nanotechnology have attracted world wide interest recently, and remarkable progress has been made when introducing this technology into the design of energy storage devices. [13][14][15][16][17][18][19][20][21][22][23][24][25] In particular, nanostructures prepared by rolledup nanotechnology offer controllable surface area, short charge diffusion distance, and large freedom for volume change during charge/discharge cycles. In this sense, rolledup nano structured materials can be expected to improve the energy den sity, life cycle, and rate capability of lithiumbased batteries. In addition, the high compatibility with lithography and physical vapor deposition techniques makes rolledup nanotechnology suitable for labonachip EES device fabrication as well as other tremendous integrative devices applications. [26][27][28][29][30] In this report, we focus on the recent progress of using rolledup nanostructured materials as electrodes to develop advanced EES devices, including Liion batteries (LIBs) and LiO 2 batteries. In addition, single tube based EES micro devices as diagnostic electrochemical probes for basic mechanistic investigations are summarized. Notable progress of introducing rolledup nanotechnology into the design of scalable and ultra compact electrostatic capacitors with superior performance is also reviewed. Finally, future trends of applying rolledup nanotechnology to other potential applications, such as scalable Energy storage devices, acting as complementing units for renewable energy sources, play a key role in modern society, and they serve as the dominant power supply for most portable electronics. At the heart of the development of next-generation energy storage devices lies the exploration of intrinsic material properties, architectural design and fabrication methods. Rolled-up nanotechnology, a unique method to self-assemble nanomembranes into 3D structure...

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A Bifunctional Organic Redox Catalyst for Rechargeable Lithium–Oxygen Batteries with Enhanced Performances

Cited by 37 publications

References 44 publications

Promoting Li–O₂ Batteries With Redox Mediators

Promoting Li–O₂ Batteries With Redox Mediators

Bottom‐Up Construction of Porous Organic Frameworks with Built‐In TEMPO as a Cathode for Lithium–Sulfur Batteries

Introducing Rolled‐Up Nanotechnology for Advanced Energy Storage Devices

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A Bifunctional Organic Redox Catalyst for Rechargeable Lithium–Oxygen Batteries with Enhanced Performances

Cited by 37 publications

References 44 publications

Promoting Li–O2 Batteries With Redox Mediators

Promoting Li–O2 Batteries With Redox Mediators

Bottom‐Up Construction of Porous Organic Frameworks with Built‐In TEMPO as a Cathode for Lithium–Sulfur Batteries

Introducing Rolled‐Up Nanotechnology for Advanced Energy Storage Devices

Contact Info

Product

Resources

About

Promoting Li–O₂ Batteries With Redox Mediators

Promoting Li–O₂ Batteries With Redox Mediators