Facile and efficient synthesis of α-Fe2O3 nanocrystals by glucose-assisted thermal decomposition method and its application in lithium ion batteries

Li, Yanwei; Huang, Yu; Zheng, Yuanyuan; Huang, Renshu; Yao, Jinhuan

doi:10.1016/j.jpowsour.2019.01.080

Cited by 168 publications

(58 citation statements)

References 74 publications

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“…2 a) was used to determine the crystallographic structure and phase purity of as-synthesized Fe 2 O 3 nanoparticles and yolk@shell Fe 2 O 3 @C hybrid. As illustrated in [37] . The amorphous carbon content in the yolk@shell Fe 2 O 3 @C hybrid is about 10.5 wt%, as determined by TGA analysis ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…3 (a). CV shows an obvious difference between the first cycle and subsequent cycles, which can be attributed to the irreversible structure rearrangement and decomposition of electrolyte leading to the formation of SEI layer in the initial lithiation/delithiation cycle [37,45] . In the initial cathodic process, two peaks located at about 1.65 and 0.69 V are observed.…”

Section: Resultsmentioning

confidence: 99%

“…The first hump-like peak at about 1.65 V can be attributed to the lithium intercalation in the crystal structure of Fe 2 O 3 to form Li x Fe 2 O 3 [36,39] . The sharp peak at 0.69 V is related to the electrochemical reduction reaction of Li x Fe 2 O 3 to Fe 0 , which is accompanied by the irreversible decomposition of electrolyte leading to the formation of SEI layer [37,39] . During the first anodic scan, two obvious oxidation peaks centered at 1.64 and 1.89 V can be clearly observed, which indicates the two-step oxidation of Fe 0 to Fe 3 + to regenerate Fe 2 O 3 [35] .…”

Section: Resultsmentioning

confidence: 99%

“…This corresponds to the (012) plane of α-Fe 2 O 3 (JCPDS No. 33-0 6 64) [36,37] , indicating the single-crystalline nature of the inside core. The energy dispersive X-ray spectroscopy (EDX) elemental mapping ( Fig.…”

Section: Electrochemical Characterizationmentioning

confidence: 97%

“…Among the promising anode materials are transition metal oxides (TMOs) which exhibit high specific capacities, widespread availability, and enhanced safety [22,[27][28][29][30][31][32][33][34] . One of the long studied promising TMOs, Fe 2 O 3 , has a high specific capacity (1006 mAh g −1 ), great natural abundancy, nontoxicity, and low cost [16,[35][36][37] . The practical application of Fe 2 O 3 alone as an anode material still faces unsatisfactory cyclability and poor rate performance which stem from strong agglomeration, drastic volume change, and poor electronic conductivity during electrochemical cycling [35,38,39] .…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Activation, Sintering, and Reconstruction in Energy‐Storage Technologies: Origin, Development, and Prospects

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Her research interests focus on the design of nano/micromaterials toward energy storage and conversion (i.e., Li-, Na-, and K-ion batteries) application. She joined Prof. Shibing Ni's group at the China Three Gorges University in 2020. Now she works as a lecturer at the College of Materials and Chemical Engineering, and concentrates on the morphological and structural evolution of electrode materials during cycling.

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Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

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capacities and low lithiation potentials approaching 0 V versus Li/Li + are favored for high-energy applications. [3] Their specific capacities decrease drastically when they are charged and discharged at high rates. For example, the specific capacity of graphite drops from 350 mAh g −1 at 0.2 C to 50 mAh g −1 at 2 C. [4] In addition, their sluggish interfacial kinetics and large spatial overpotential inhomogeneities under fast-charging conditions lead to undesirable plating of the Li dendrites on the electrode surface, [5] which may result in short circuits and thermal runaway. [6] To address this issue, Li 4 Ti 5 O 12 (LTO), which exhibits superior structural stability at high rates, is currently used as an anode in high-power LIBs. [7] The LTO can maintain high stability even when charged and discharged at 50 C. [8] However, in comparison to graphite, the low theoretical capacity (175 mAh g −1 ) and high lithiation potential (1.55 V versus Li/Li + ) of LTO results in a considerably lower energy density of the battery. [9] Therefore, a significant amount of energy density must be sacrificed to achieve high power density in the LIBs. [1a] In recent years, a series of niobium-based anode materials, such as the TiNb 2 O 7 (TNO), [10] Ti 2 Nb 10 O 29 , [11] Nb 16 W 5 O 55 , [5a] and Nb 2 O 5 , [12] have been reported as alternatives to LTO. Among them, TNO is the most promising candidate because of its similar lithiation potential (1.64 V versus Li/Li + ) and considerably higher theoretical capacity (387 mAh g −1 ) than that of LTO. The layered monoclinic structure of the TNO, which consists High-power lithium-ion batteries (LIBs) are critical for power-intensive applications; however, their development is largely hindered by the lack of anode materials that have stability and high capacity at high charging/discharging rates. Herein, a cationic disordering strategy is reported to build an ideal high-power anode with boosted intercalation kinetics and a stable framework. A novel titanium niobate (TiNb 2 O 7 ) anode with unique predistorted Nb(Ti) O 6 octahedrons (pd-TNO) is developed by introducing cation disorder, which allows ultrafast Li + storage within seconds and exceptional stability over long cycling at high rates. The pd-TNO delivers an outstanding specific capacity of 153 mAh g −1 at 100 C, 20 times higher than that of conventional TNO anodes without cationic disordering, and retains 42.8% of the capacity after 15,000 cycles. Using the pd-TNO anode, a high-power LIB with an unprecedented power density of 91,197 W kg −1 at 200 C, which is approximately eight times higher than that of the advanced commercial high-power anode Li 4 Ti 5 O 12 (11,813 W kg −1 at 50 C), is demonstrated. Importantly, the pd-TNO is prepared under ambient conditions via a high-throughput process, and it exhibits considerable potential for scalability for practical applications.

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Facile and efficient synthesis of α-Fe2O3 nanocrystals by glucose-assisted thermal decomposition method and its application in lithium ion batteries

Cited by 168 publications

References 74 publications

High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

High performance columnar-like Fe2O3@carbon composite anode via yolk@shell structural design

Electrochemical Activation, Sintering, and Reconstruction in Energy‐Storage Technologies: Origin, Development, and Prospects

Unprecedented Superhigh‐Rate and Ultrastable Anode for High‐Power Battery via Cationic Disordering

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