3D Current Collectors for Lithium‐Ion Batteries: A Topical Review

Yue, Yuan; Liang, Hong

doi:10.1002/smtd.201800056

Cited by 99 publications

(85 citation statements)

References 141 publications

(140 reference statements)

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“…For instance, Zhu et al demonstrated the wavelength‐tunable lasing from MAPbX 3 nanowires with pretty low lasing threshold (220 nJ cm −2 ) . Some closely related works of discussing the exciton photophysics and exciton lasing can refer to the reviews . Note that, besides the commonly studied photonic lasing, exciton–polariton lasers have also been realized by employing perovskite materials as discussed in Section .…”

Section: Photogenerated Free Charge Carrier: Transport Recombinationmentioning

confidence: 99%

Properties of Excitons and Photogenerated Charge Carriers in Metal Halide Perovskites

2019

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their great success in photovoltaics (PVs), with a phenomenally rapid rise of the power conversion efficiency (PCE) from 3.8% [1] to over 23% [2,3] in the past few years. Such high PCE of perovskite solar cells has been ascribed to the ultralong carrier lifetimes, [4][5][6][7][8] long carrier diffusion lengths, [9][10][11][12][13][14] and the extraordinarily defect tolerance. [15][16][17] Following the success of perovskites in photovoltaics, research on light-emitting diodes (LEDs), [18,19] amplified spontaneous emission (ASE) or lasers, [20][21][22][23][24] and photodetectors [25][26][27][28][29] have also gained substantial interests. Meanwhile, the rapid progress of MHPs on various applications spurred a flurry of photophysical studies in order to understand the origin of the high performance of these devices, of which the nature of the photoexcitation species has been mostly debated. [5,22,30,31] Since the photoexcitation states near the bandgap affect the key processes such as charge transport and light emission of optoelectronic devices, there is no doubt that the investigation of electronic excitations near the optical band edge is crucial for MHPs. Such knowledge is essential not only for understanding the correlation between the fundamental photophysics and device performances, but also offering a guideline for their further applications with improved performances. Generally, there are two kinds of photoexcitations near the band edge for direct bandgap semiconductors: free carriers and excitons. Exciton binding energy that reflects the Coulomb interaction strength between photoexcited electrons and holes determines the balance of the populations between the two species. Typically, inorganic semiconductors are free-carrier materials with the exciton binding energies only in few meV at room temperature and their excited states being populated principally by free carriers. While organic semiconductors are excitonic materials with the exciton binding energies in hundreds of meV and thus excitons prevailing in the excited states. Whereas, MHPs that combine some merits of organic and inorganic semiconductors seem to stand for an exotic class of semiconductors between these two limiting cases, with the experimentally determined exciton binding energy varying in a wide range of 2 to more than 50 meV for the prototype perovskite MAPbI 3 . [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] Such large variations of the exciton binding energies reported for MHPs give rise to a strongly debated question, that is, whether free carriers or excitons are generated upon photoexcitation? In other words, what is the nature of the photoexcitation species Metal halide perovskites (MHPs) have recently attracted great attention from the scientific community due to their excellent photovoltaic performance as well as their tremendous potential for other optoelectronic applications such as light-emitting diodes, lasers, and photodetectors. Despite the rapid progress in device applications, a solid unders...

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Section: Photogenerated Free Charge Carrier: Transport Recombinationmentioning

confidence: 99%

Properties of Excitons and Photogenerated Charge Carriers in Metal Halide Perovskites

2019

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“…[133][134][135] Hierarchical micro-nanostructured electrodes can exploit the positive attributes of nanostructures for increased surface area, nanometer diffusion lengths, nano-confinement effects, and microstructures for improved stability and ease of handling during electrode preparation. 119,136 They can be fabricated through the aggregation of nanosized crystallites to form larger, porous agglomerates, which can be then further grouped into micrometer-sized grains (e.g., see Fig. 5).…”

Section: Electrode Morphology and Structuringmentioning

confidence: 99%

High-rate lithium ion energy storage to facilitate increased penetration of photovoltaic systems in electricity grids

Lennon

Jiang

Hall

et al. 2019

MRS Energy & Sustainability

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“…Therefore, new nanostructuration strategies have been developed to address these above challenging issues. Particularly, nanoarchitectured current collectors thus have emerged as one of the most efficient strategies . In this section, we will first give introductory background on the charge storage mechanisms of pseudocapacitive materials, and then outline the subsequent design considerations of ideal nanoarchitectured current collectors for PCs.…”

Section: Design Philosophy Of Nanoarchitectured Current Collectors Fomentioning

confidence: 99%

Review on Nanoarchitectured Current Collectors for Pseudocapacitors

2018

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Supercapacitors are of high importance as electrochemical energy storage devices attributing to their outstanding power performance, excellent reversibility and long cycle life. But meanwhile, they suffer from low energy when compared with batteries. Pseudocapacitive materials with a high theoretical capacitance hold a great promise in boosting the energy storage capability for supercapacitors. The emergence of nanoarchitectured current collectors aims to reach their full potentials in charge storage by addressing the challenging issues such as the intrinsically low electrical conductivity, and the sluggish charging–discharging behavior of most pseudocapacitive materials. This review pays particular attention to the advances of nanoarchitectured current collectors for pseudocapacitors. It first gives an introductory background on the design philosophy for nanoarchitectured current collectors based on the charge storage mechanism in pseudocapacitors and also outlines the consequent design considerations, then summarizes the recent achievements in design, fabrication, and utilization of nanoarchitectured current collectors for pseudocapacitors with representative results presented. A comprehensive overview of the strengths and weaknesses of nanoarchitectured current collectors for pseudocapacitors is also highlighted. At the end, future trends and opportunities associated with nanoarchitectured current collectors for pseudocapacitors are discussed.

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3D Current Collectors for Lithium‐Ion Batteries: A Topical Review

Cited by 99 publications

References 141 publications

Properties of Excitons and Photogenerated Charge Carriers in Metal Halide Perovskites

Properties of Excitons and Photogenerated Charge Carriers in Metal Halide Perovskites

High-rate lithium ion energy storage to facilitate increased penetration of photovoltaic systems in electricity grids

Review on Nanoarchitectured Current Collectors for Pseudocapacitors

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