Recent Progress in Aqueous Lithium‐Ion Batteries

Wang, Yangang; Yi, Jin; Xia, Yongyao

doi:10.1002/aenm.201200065

Cited by 527 publications

(373 citation statements)

References 47 publications

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“…TiO 2 , among other TMOs, is particularly attractive owing to its fascinating features including high structural stability, long cycle life, low cost, and high safety. [17][18][19][20][21] TiO 2 (B), as an unusual polymorph (bronze-phase) of TiO 2 , is found to have an open-channel structure and display a pseudo-capacitive behavior, thus enabling easier Li + diffusion and faster chargingdischarging capabilities.…”

Section: Doi: 101002/admi201500239mentioning

confidence: 99%

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Zhu

Sun

et al. 2015

Adv Materials Inter

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and transition metal oxides (TMOs) [13][14][15][16] have recently been explored as promising anode candidates.TiO 2 , among other TMOs, is particularly attractive owing to its fascinating features including high structural stability, long cycle life, low cost, and high safety. [17][18][19][20][21] TiO 2 (B), as an unusual polymorph (bronze-phase) of TiO 2 , is found to have an open-channel structure and display a pseudo-capacitive behavior, thus enabling easier Li + diffusion and faster chargingdischarging capabilities. [ 22 ] Its theoretical capacity (335 mA h g −1 ) therefore significantly surpasses that (≈170 mA h g −1 ) of anatase or rutile TiO 2 , and is comparable to that (372 mA h g −1 ) of graphitic carbons. In consequence, various TiO 2 (B) nanostructures in the form of, e.g., nanoparticles, [23][24][25] nanorods, [ 26,27 ] nanowires, [28][29][30][31] nanotubes, [32][33][34][35][36] or nanosheets, [ 37,38 ] have been intensively studied as LIB anodes.It is worth noting, however, that the poor intrinsic conductivity of TiO 2 (B) inevitably sets obstacles for its applications as a high-power anode material. In this context, various carbonaceous materials, e.g., activated carbon fabrics, [ 39 ] carbon coatings, [ 40 ] carbon nanotubes, [ 41 ] or graphene nanosheets, [42][43][44][45] are introduced as conductive additives to ease the electron transport, thereby improving the cycle performances of TiO 2 (B) at high rates. Despite this progress, the reversible capacity of TiO 2 (B) is still insuffi cient, especially when compared to other TMOs, such as Fe 2 O 3 , [46][47][48][49][50] SnO 2 , [51][52][53][54] Co 3 O 4 , [ 55 ] and MnO 2 , [ 56 ] all of which boast of their much higher theoretical capacities (800−1200 mA h g −1 ) than TiO 2 (B).In this work, we expect to address the conductivity and capacity defi ciencies of TiO 2 (B) through a smart morphological and compositional design, aiming to achieve excellent reversible capacities and rate capabilities at the same time. Here we report elaborately designed hierarchical heterostructures, consisting of carbon-coated TiO 2 (B) nanosheets decorated with Fe 3 O 4 nanoparticles, based on a one-step self-assembly strategy through van der Waals interactions. [ 57 ] We stress that compared to other hybridization approaches based on hydrothermal synthesis, [46][47][48][50][51][52][53]55,56 ] atomic layer deposition, [ 49 ] and thermal pyrolysis, [ 54 ] our one-step self-assembly strategy is really facile and energy-effi cient, since it does not require harsh

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Section: Doi: 101002/admi201500239mentioning

confidence: 99%

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Zhu

Sun

et al. 2015

Adv Materials Inter

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“…34 We find aqueous electrolyte is practical for technique development: carbonates are more viscous than aqueous electrolyte, leading to higher flow pressures and potentially more window breakages. In the event of electrolyte leakage, aqueous liquid will dissipate quickly while carbonate electrolytes lead to contamination of the microscope column.…”

Section: A Baseline For Electrochemistry In the Temmentioning

confidence: 99%

Nanoscale Imaging of Lithium Ion Distribution During In Situ Operation of Battery Electrode and Electrolyte

et al. 2014

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The integration of renewable, and often intermittent, energy sources such as solar and wind into the energy landscape, as well as the electrification of transportation, requires dramatic advances in electrical energy conversion and storage technologies including fuel cells, batteries and supercapacitors. TEM detection of lithium through a liquid is difficult, because lithium is a weak elastic scatterer and multiple scattering from the liquid overwhelms the inelastic core-loss signal in electron energy-loss spectroscopy (EELS). In this work, we successfully observed the lithiation state by valence energy-filtered TEM (EFTEM), which probes the low-energy regime (~1-10 eV), and allows us to work in thicker liquid layers than core-level A Baseline for Electrochemistry in the TEMWe use a liquid cell holder developed by Protochips using chips we designed to mimic a typical electrochemical cell (Figure 1a-b). The tip of the holder is a microfluidic flow cell with silicon nitride viewing membranes that confine a liquid, shown in cross section in Figure 1a. Figure 1b illustrates the top chip, with three patterned electrodes optimized for electrochemical cycling and imaging. Traditional silicon-processing methods use a chromium adhesion layer and gold electrodes. However, chromium diffuses rapidly 6 through gold (especially at grain boundaries) and can affect and even dominate the electrochemical signal. In addition, high-atomic-number electrodes such as Pt and Au obscure imaging. Instead, we used a carbon working electrode which only weakly scatters electrons and is commonly used in bulk electrochemistry, and titanium adhesion layers under platinum reference and counter electrodes. This allows us to image through the electrode with little loss in spatial resolution and contrast, which is dominated by scattering in the liquid instead. As a practical matter, and discussed below, spatial resolution is often limited by the low doses needed to control radiation damage than by beam spreading in the cell.To demonstrate that in situ electrochemistry reproduces well-established criteria, we performed cyclic voltammetry of a film of platinum, shown in Figure 1c-d, in the TEM.This control experiment represents a test case for quantitative electrochemistry, since the features are surface effects -including hydrogen adsorption and desorption and oxide formation and reduction -which are sensitive to contaminants at the sub-monolayer level.The in situ electrochemistry reproduced the characteristic voltametric profile of a polycrystalline platinum electrode at an appropriate current scale, regardless of the electron beam. In thin liquid layers, the ohmic drop in the solution becomes significant, as evidenced by the slanted curve in Figure 1d. This implies an inherent compromise between the highest spatial resolution imaging and quantitative electrochemistry.Accounting for ohmic drops in solution, this setup replicates results of a conventional electrochemical cell while obtaining nanometer resolution. 7Having established the electroch...

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“…[53] Furthermore, some poorly understood issues still exist for the aqueous system, which need to be solved for future practical applications in large-scale electric energy storage. [53,54] …”

Section: Aqueous Sodium-ion Full-cell Systemmentioning

confidence: 99%

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

Deng

Luo

Chou

et al. 2017

Advanced Energy Materials

570

356

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Sodium‐ion batteries (SIBs) have been considered as the most promising candidate for large‐scale energy storage system owing to the economic efficiency resulting from abundant sodium resources, superior safety, and similar chemical properties to the commercial lithium‐ion battery. Despite the long period of academic research, how to realize sodium‐ion battery commercialization for market applications is still a great challenge. Thus, from the perspective of future practical application, this review will identify the factors that are restricting commercialization, and evaluate the existing active materials and sodium‐ion‐based full‐cell system. The design and development trends that are needed for SIBs to meet the requirements of practical applications in large‐scale energy storage will also be discussed in detail.

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Recent Progress in Aqueous Lithium‐Ion Batteries

Cited by 527 publications

References 47 publications

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Nanoscale Imaging of Lithium Ion Distribution During In Situ Operation of Battery Electrode and Electrolyte

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

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Recent Progress in Aqueous Lithium‐Ion Batteries

Cited by 527 publications

References 47 publications

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO2(B) Nanosheets Decorated with Fe3O4 Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO2(B) Nanosheets Decorated with Fe3O4 Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Nanoscale Imaging of Lithium Ion Distribution During In Situ Operation of Battery Electrode and Electrolyte

Sodium‐Ion Batteries: From Academic Research to Practical Commercialization

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Product

Resources

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Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage

Elaborately Designed Hierarchical Heterostructures Consisting of Carbon‐Coated TiO₂(B) Nanosheets Decorated with Fe₃O₄ Nanoparticles for Remarkable Synergy in High‐Rate Lithium Storage