High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite

Son, Yeonguk; Lee, Taeyong; Wen, Bo; Ma, Jiyoung; Jo, Changshin; Cho, Yoon-Gyo; Boies, Adam M.; Cho, Jaephil; Volder, Michaël De

doi:10.1039/d0ee02230f

Cited by 58 publications

(44 citation statements)

References 47 publications

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“…The oxidation peaks at around 0.53 V correspond to the Li dealloying process of the Li-Si phases to Si domains. [26] The SiNWs@ RGO electrode exhibited excellent electrochemical performance owing to its unique structure. The self-supporting electrode charge-discharge curve of SiNWs-76 (Figure 4a) showed that SiNWs-76 exhibited an initial charge capacity of 3484.3 mAh g −1 with an ICE of ≈89.5% (Figure 4b).…”

Section: Resultsmentioning

confidence: 99%

Millisecond Conversion of Photovoltaic Silicon Waste to Binder‐Free High Silicon Content Nanowires Electrodes

Liu

et al. 2021

Advanced Energy Materials

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High‐value recycling of photovoltaic silicon waste is an important path to achieve “carbon neutrality.” However, the current remelting and refining technology of Si waste (WSi) is tedious with high secondary energy consumption and repollution, and it can only achieve its relegation recycling. Here, an efficient and high‐value recycling strategy is proposed in which photovoltaic WSi is converted to high energy density and stable Si nanowires (SiNWs) electrodes for lithium‐ion batteries (LIBs) in milliseconds. The flash heating and quenching (≈2100 K, 10 ms) provided by an electrothermal shock drive directional diffusion of Si atoms to form SiNWs within the confined space between graphene oxide films. As a result, the SiNWs self‐assemble to form a conductive SiNWs–reduced graphene oxide composite (SiNWs@RGO). When applied as a binder‐free anode for LIBs the SiNWs@RGO electrode exhibits an ultrahigh initial Coulombic efficiency (89.5%) and robust cycle stability (2381.7 mAh g−1 at 1 A g−1 for more than 500 cycles) at high Si content of 76%. Moreover, full LIBs constructed using the commercial Li[Ni0.8Co0.16Al0.04]O2 cathode exhibit impressive cycling performance. In addition, this clean high‐value recycling method will promote economic, environmentally friendly, and sustainable development of renewable energy.

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Section: Resultsmentioning

confidence: 99%

Millisecond Conversion of Photovoltaic Silicon Waste to Binder‐Free High Silicon Content Nanowires Electrodes

Liu

et al. 2021

Advanced Energy Materials

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“…For comparison, representative values whose cycling number is over 100 in the literature were included in the plot, and the number of cycles is also specified. The literature values were categorized into five different groups—porous scaffolds made of carbonaceous materials [ 33,46–53 ] (blue triangles in Figure 5d) and metals [ 16,19,54–61 ] (orange inverse triangles), porous scaffolds whose separator side is covered by coating layers, [ 15,22,62,63 ] (similar to our LM‐CNT configuration) (green diamonds), lithium metal covered by polymeric [ 23,25,64–69 ] (yellow green squares), or ceramic materials [ 70–72 ] (pink circles). As for metal‐based and carbon‐based scaffolds, lithiophilic materials (Au, [ 55 ] CuO, [ 17,56,57 ] MnO 2 , [ 48 ] ZnO, [ 59,61 ] Si [ 33 ] ) were often decorated in the pores to alleviate lithium clogging near the inlet of the pores during lithium plating.…”

Section: Resultsmentioning

confidence: 99%

Large Cumulative Capacity Enabled by Regulating Lithium Plating with Metal–Organic Framework Layers on Porous Carbon Nanotube Scaffolds

Noh

Chen

et al. 2021

Adv Funct Materials

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The high specific capacity of lithium metal is ideal to meet the current demand in rechargeable batteries but lithium dendrites and irreversible volume expansions are major hurdles. 3D lithium host materials can alleviate these problems by lowering the current density with large surface areas and accommodating lithium metal in their pores. However, lithium dendrites are persistently observed because of sluggish lithium‐ion diffusion through tortuous pores, resulting in clogging and thereby dendrite growth. Herein, layered metal–organic frameworks (MOFs) are deposited on carboxylated carbon nanotube (CNT) scaffolds via coordination bonding. The MOF layer on the outside of the CNT scaffold has augmented lithium insertion into the porous scaffolds (24 mAh cm−2 at 8 mA cm−2) and lithium plating/stripping lifetime (over 1700 h with 20 mAh cm−2 cycle−1). MOF has pores large enough for lithium ions to permeate through, and its electronically insulating property creates capacitive effects, distributing lithium ions over the surface of the MOF layer to avoid dendrite growth and clogging during lithium plating. Outstanding volumetric and gravimetric capacities (≈940 mAh cm−3 and ≈980 mAh g−1) along with exceptional cumulative capacity (≈4.9 Ah cm−2) are obtained. This promising approach can store lithium without dendrites to deliver high energy densities required for the current rechargeable batteries.

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“…133 The intermetallic interphase concept is apparently well suited for this new design to regulate the Li deposition behavior. 134 However, it should also be realized that we are still inconclusive about the more fundamental working mechanisms behind many of the successful demonstrations. For instance, lower reactivity against the electrolyte, reduced nucleation barrier, better surface chemistry uniformity, faster surface Li + diffusion, improved charge transfer of Li + at the LMA-electrolyte interface, and so forth.…”

Section: Discussionmentioning

confidence: 99%

Intermetallic interphases in lithium metal and lithium ion batteries

Sun

Peng

2021

InfoMat

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A robust electrode-electrolyte interface is the cornerstone for every battery system, as demonstrated in the meandering history of the development of Li-ion batteries (LIBs). In the thrust to replace the graphite anode with more energetic ones in LIBs, the effectual strategy for stabilizing the original graphiteelectrolyte interface becomes obsolete and a new anode-electrolyte interface needs reconfiguration. Unfortunately, this interface has become the Achilles' heel for those anodes, such as Li-metal anode (LMA) and Si-based anode owing to their excessive reductivity, enormous volume change, and so forth. Encouragingly, in the last decade, impressive progress has been made on taming these extremely unstable interfaces and on the solid-state batteries (SSBs) that are reported to be less susceptible to parasitic reactions. One of the distinguished strategies is the application of artificial Li-alloying intermetallic interphases onto the surface of LMA, via the direct introduction of foreign metals to the Li anode or indirect hetero-cations doping in the electrolyte, to regulate the Li deposition/ stripping behavior, which has markedly improved the stability of the LMAelectrolyte interface. In parallel, the intermetallic interphases are also witnessed to profoundly enhance the anode-solid electrolyte contact and the corresponding charge transfer kinetics in various SSBs. This review will provide a panoramic overview of the application of the intermetallic interphases at the anode-electrolyte interfaces in the lithium metal batteries (LMBs), SSBs, and also derivative works in the conventional LIBs, which will focus on different concepts, methodologies, and understandings from the encircled studies.

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High energy density anodes using hybrid Li intercalation and plating mechanisms on natural graphite

Abstract: A novel Li-Ion battery anode is presented which leverages the good performance of industrial graphite anodes and enhances their performance by allowing for reversible Li plating on their surface.

Cited by 58 publications

References 47 publications

Millisecond Conversion of Photovoltaic Silicon Waste to Binder‐Free High Silicon Content Nanowires Electrodes

Millisecond Conversion of Photovoltaic Silicon Waste to Binder‐Free High Silicon Content Nanowires Electrodes

Large Cumulative Capacity Enabled by Regulating Lithium Plating with Metal–Organic Framework Layers on Porous Carbon Nanotube Scaffolds

Intermetallic interphases in lithium metal and lithium ion batteries

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