Selenium Impregnated Monolithic Carbons as Free‐Standing Cathodes for High Volumetric Energy Lithium and Sodium Metal Batteries

Ding, Jia; Zhou, Hui; Zhang, Hanlei; Tong, L.; Mitlin, David

doi:10.1002/aenm.201701918

Cited by 138 publications

(118 citation statements)

References 79 publications

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conductivity, and high volumetric energy density. [4] Comparable to the S cathode, a Se cathode also has major concerns regarding volume expansion of Se (>97%) and shuttle effects by polyselenide intermediates. [4] Comparable to the S cathode, a Se cathode also has major concerns regarding volume expansion of Se (>97%) and shuttle effects by polyselenide intermediates.

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confidence: 99%

“…High ionic conductivity in the SPE could create a facile ion pathway, resulting in improved battery performance. [4,23] The Se-SPE1 cell presented a large fluctuation in battery performance while the Se-LE cell demonstrated a gradually decreasing capacitive performance of 290 mAh g −1 and around 72% energy efficiency. Moreover, the thermal stability of the SPE was evaluated by TGA ( Figure S8, Supporting Information).…”

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High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Kim

Cho

Lee

2019

Advanced Energy Materials

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conductivity, and high volumetric energy density. [8][9][10] Moreover, Se is a reasonably priced element, being around $ 32 per kg when purchased in industrial quantities. [4] Comparable to the S cathode, a Se cathode also has major concerns regarding volume expansion of Se (>97%) and shuttle effects by polyselenide intermediates. [11,12] To address these concerns, most studies have focused on the incorporation of functional materials such as porous carbons, conductive polymers, and metal oxides. [5][6][7] In general, the Se cathode is prepared by complicated multistep processes, which are consisted of encapsulating of Se into porous carbon (Se/C composite), slurry preparation using high energy ball-mixing of Se/C composites and other additives, deposition of the slurry on a current collector, and finally pressing the cathode. [11][12][13] In the Se cathode, there exist complex interfaces due to multicomponents system. Furthermore, all the additives do not contribute to electrochemical redox reaction lowering energy density and polymer binder even can increase interfacial resistance. Thus, it would be highly desirable to provide a simple fabrication process and stable cycling to Li-Se battery. [14][15][16] Herein, we introduced a new design of Se cathode, which was simply prepared by electrochemical deposition of Se on Nifoam and subsequent coating of a thin layer of solid polymer electrolyte (SPE). The electrodeposition of Se on Ni-foam is an easy process, and direct contacts of Se on current collector provide facile charge transport. The SPE was easily prepared via crosslinking reaction of poly(ethylene glycol) diglycidyl ether (DE-PEG) and diamino-poly(propylene oxide) (DA-PPG) with subsequent immersion in a LiPF 6 based carbonate electrolyte. The elastic SPE layer is able to protect the delamination problem of Se from the Ni-foam controlling the volume expansion of Se, to provide facile ionic pathway, and to suppress Li-dendrite growth. The designed "One-piece" Se cathode was produced by facile manufacturing process and exhibited an ultrastable cycling performance of 0.001% capacity degradation per cycle for 3000 cycles at 1 C rate.A schematic preparation of the one-piece Se cathode is shown in Figure 1. In the preparation of the one-piece Se cathode, Se was electrodeposited on the Ni-foam and a prepolymer solution of SPE was poured on the Se/Ni-foam to fill the pore. The prepolymer was thermally cross-linked and liquid electrolyte was impregnated. At the bottom of Ni-foam, a thin layer (≈20 µm) of SPE was formed which was directly contacted with Li metal foil. Moreover, the thickness of SPE in A high-performance Li-Se battery is demonstrated by adopting a novel Se cathode design. The Se cathode is a one-piece body combined with a Se deposited current collector and a solid polymer electrolyte (SPE). In the preparation of the Se cathode, Se is electrodeposited on Ni-foam, and the pores are filled with SPE layers. Through this electrodeposition, the cathode is easily fabricated, and charge transports are facile...

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High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Kim

Cho

Lee

2019

Advanced Energy Materials

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“…Consequently,t he b value of Fe 2 O 3 /GR can be quantified from the plots of log i versus log v for peaks 1a nd 2( 0.96 and 0.93, Figure 4b), [36,37] giving av alue approaching1 .0, [38,39] suggesting the kinetics of lithiation/delithiation are dominated by capacitive behavior. [40,41] The corresponding ratios of contribution can be quantified according to the Equations (4) and (5). [42][43][44][45]…”

Section: Resultsmentioning

confidence: 99%

Advanced Li‐Ion Batteries with High Rate, Stability, and Mass Loading Based on Graphene Ribbon Hybrid Networks

Zhang

Wei

Jiang

et al. 2019

Chemistry A European J

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To optimize the cycle life and rate performance of lithium-ion batteries (LIBs), ultra-fine Fe 2 O 3 nanowires with a diameter of approximately 2nmu niformly anchoredo na cross-linked graphene ribbon network are fabricated. The unique three-dimensional structure can effectively improve the electrical conductivity and facilitate ion diffusion,e specially cross-plane diffusion. Moreover,F e 2 O 3 nanowires on graphene ribbons( Fe 2 O 3 /GR) are easilya ccessible for lithium ions compared with the traditional graphene sheets (Fe 2 O 3 / GS). In addition, the well-developed elastic network can not only undergo the drastic volume expansionduring repetitive cycling, but also protect the bulk electrode from further pulverization. As ar esult,t he Fe 2 O 3 /GR hybrid exhibits high rate and long cycle life Li storagep erformance (632 mAh g À1 at 5Ag À1 ,a nd 471 mAh g À1 capacity maintained even after 3000 cycles). Especially at high mass loading(% 4mgcm À2 ), the Fe 2 O 3 /GR can still deliver higher reversible capacity (223 mAh g À1 even at 2Ag À1 )c ompared with the Fe 2 O 3 /GS (37 mAh g À1 )f or LIBs.Scheme1.Schematicoft he synthesis procedureofF e 2 O 3 nanowires anchored on GR, and the corresponding Li ion transfer pathwaysf or Fe Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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“…To prevent the polyselenides from undergoing dissolution and shuttle in Li‐Se cells, the strategies that have been employed to date involve the encapsulation or embedding of Se particles in nitrogen‐doped carbon scaffolds, hierarchical porous carbon spheres, hybrid microballs of graphene, microporous carbon, porous carbon nanofibers, hierarchical graphene–carbon nanotubes, monolithic carbon, and so forth. In a report of note, Zhen et al.…”

Section: Introductionmentioning

confidence: 99%

“…To preventt he polyselenides from undergoingd issolution and shuttlei nL i-Se cells, the strategies that have been employedt od ate involve the encapsulation or embedding of Se particles in nitrogen-doped carbons caffolds, [11] hierarchical porous carbons pheres, [12] hybrid microballs of graphene, [13] microporous carbon, [14] porousc arbon nanofibers, [15] hierarchical graphene-carbon nanotubes, [16] monolithic carbon, [17] and so forth.I nar eport of note, Zhen et al developed an ovel Se composite by confining Se within porous carbon nanospheres (Se/PCN). The composite with 70.5 wt %S el oading showeda n initialv olumetric capacity of 3150 mA hcm À3 ,a nd also exhibited good cycling stabilityo ver 1200 cycles with 0.03 %d ecay per cyclea t1current( C) rate.…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Interlayer for Long‐Lived Lithium–Selenium Batteries

Mukkabla

Kuldeep

Krushnamurty

et al. 2018

Chemistry A European J

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A lithium–selenium (Li‐Se)‐alkali activated carbon hybrid cell with a tungsten oxide interlayer is implemented for the first time. The Se hybrid at a Se loading of 70 % in the full Li–Se cell delivers a large reversible capacity of 625 mA h gSe−1, in comparison with 505.8 mA h gSe−1 achieved for the pristine Se cell. This clearly shows the advantage of the carbon in improving the capacity of the Li‐Se cell. A tungsten oxide interlayer is drop‐cast over the battery separator to further circumvent the issues of polyselenide dissolution and shuttle, which cause severe capacity fading. The oxide layer conducts Li ions, as evidenced from the Li‐ion diffusion coefficient of 4.2×10−9 cm2 s−1, and simultaneously blocks the polyselenide crossover, as it is impermeable to polyselenides, thereby reducing the capacity fading with cycling. The outcome of this unique approach is reflected in the reversible capacities of 808 and 510 mA h gSe−1 achieved for the Li‐oxide@separator/Se‐alkali activated carbon cell before and after 100 cycles, respectively, thus demonstrating that carbon and oxide can efficiently restrict the capacity fading and improve the performances of Li‐Se cells.

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Selenium Impregnated Monolithic Carbons as Free‐Standing Cathodes for High Volumetric Energy Lithium and Sodium Metal Batteries

Cited by 138 publications

References 79 publications

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

High‐Performance Li–Se Battery Enabled via a One‐Piece Cathode Design

Advanced Li‐Ion Batteries with High Rate, Stability, and Mass Loading Based on Graphene Ribbon Hybrid Networks

Metal Oxide Interlayer for Long‐Lived Lithium–Selenium Batteries

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