In Situ EXAFS‐Derived Mechanism of Highly Reversible Tin Phosphide/Graphite Composite Anode for Li‐Ion Batteries

Ding, Yujia; Li, Zhe‐Fei; Timofeeva, Elena V.; Segre, Carlo U.

doi:10.1002/aenm.201702134

Cited by 64 publications

(45 citation statements)

References 36 publications

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“…More efforts on quantitative analysis on the recovery degree are needed, which may be realized by introducing some advanced tools such as in situ X-ray absorption fine structure. [39]…”

Section: Resultsmentioning

confidence: 99%

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries

Wei

Huang

et al. 2018

Advanced Energy Materials

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electrode kinetics, large volume change, and physical strains during the Li insertion/ extraction process, resulting in large polarization, rapidly declining capacity, and poor rate performances. [10] Moreover, it had been detected by various in situ techniques that serious irreversible transformation from crystallization to amorphous phase would occur for conversion type anodes along with their first discharge-charge process, which tends to lead poor initial coulombic efficiency (ICE) and fast capacity decay. [11] To better relax the structure stress during the charging/discharging, efforts have been made to synthesize the isotropic amorphous nanomaterials from the beginning to facilitate the stress relaxation and fruitful percolation pathway, which are proved effective to promote their cycle performance. [12] However, the low initial coulomb efficiency (usually <70%) and large voltage polarization are still unsolved due to the low conductivity of the electrode and poor electrochemical reversibility of the discharge product Li 2 O, which seriously impede the commercialization of such metal oxides anode materials. [13] Compared with the metal oxides, the typical layer structured metal sulfides or selenides MX 2 (M = Mo, W, X = S, Se) have attracted more and more research attention in recent years due to their unique structure properties and much better conductivity. [14] On the one hand, these metal sulfides possess superior structure flexibility due to their unique layered structure, which enables capabilities of quick Li ion intercalation, fast ion diffusion, and swift charge transfer along the interlayer space. [15] On the other hand, the conductivity of these sulfide or selenides (≈ ≥10 −4 S cm −1 ) is much higher than that of the metal oxides (≈ ≤10 −6 S cm −1 ) as well. [16] Moreover, metal sulfides show lower voltage as well as smaller charge/discharge voltage polarization than that of the metal oxides, promising a larger energy density and higher energy efficiency when assembled into the full cells. [17] However, similar to metal oxides, metal sulfide or selenides still suffer from serious structure destruction of their ordered layer characteristic, and the broken MX bonding along with lithiation process is hard to be rebuilt again even after Li + extraction. [10b,18] As a result, the electrode was mainly composed of metal M and S (Se) instead of original MX 2 after the first cycle, as reported in the typical cases of WS 2 and MoS 2 materials. [19] Therefore, low initial coulomb efficiency and The metal sulfide or selenides have attracted increasing attention for highenergy lithium-ion batteries due to their unique layer structure flexibility, higher conductivity, and lower voltage polarization than metal oxides. However, low initial coulomb efficiency (ICE), serious structure destruction, and irreversible bonding chemistry are still big challenges for their practical application. Herein, layer GeSe 2 and its carbon composite are synthesized by high-energy ball milling and it is surprisingly found that ...

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“…More efforts on quantitative analysis on the recovery degree are needed, which may be realized by introducing some advanced tools such as in situ X-ray absorption fine structure. [39]…”

Section: Resultsmentioning

confidence: 99%

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries

Wei

Huang

et al. 2018

Advanced Energy Materials

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“…d) Long‐term cycling performance of N‐C, Ni 2 P@N‐C, and Ni 2 P electrodes at a current rate of 1 A g −1 . e) The cycle life and stability of this work are compared with other reported works: Ni 2 P⊂pGN, Ni 2 P/G, h‐Ni 2 P, MoP‐C, CoP/NC, (Fe) Ni 2 P/G, CuP 2 /C, Sn 4 P 3 /C, Ni 12 P 5 /CNTs, Ni 2 P/C, Sn 4 P 3 /G, CoP⊂NPPCS, H‐FeP@C@GR, GeP 5 @C‐NF, CuP 2 /C, Co 2 P/NCNTFs, and Ni 2 P/NPC …”

Section: Resultsmentioning

confidence: 90%

Empowering Metal Phosphides Anode with Catalytic Attribute toward Superior Cyclability for Lithium‐Ion Storage

Yuan

Zheng

et al. 2019

Adv Funct Materials

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Due to high capacity, moderate redox voltage, and relatively low polarization, metal phosphides (MPs) attract much attention as viable anode materials for lithium-ion storage. However, severe capacity decay induced by the poor reversibility of discharge product (Li 3 P) in these anodes suppresses their practical applications. Herein, it is first revealed that N-doped carbon can effectively catalyze the oxidation of Li 3 P by density functional theory calculations and activation experiments. By anchoring Ni 2 P nanoparticles on N-doped carbon sheets (Ni 2 P@N-C) via a facile method, an MP-based anode rendered with a catalytic attribute is successfully fabricated for improving the reversibility of Li 3 P during lithium-ion storage. Benefiting from this design, not only can high capacity and rate performance be reached, but also an extraordinary cyclability and capacity retention be realized, which is the best among all other phosphides reported so far. By employing such a Ni 2 P@N-C composite and a commercialized active carbon as the anode and cathode, respectively, hybrid lithium-ion capacitors can be fabricated with an ultrahigh energy density of 80 Wh kg −1 at a power density of 12.5 kW kg −1 . This strategy of designing electrodes may be generalized to other energy storage systems whose cycling performance needs to be improved.

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“…Indium phosphide is one of MPs. Just like other MPs, indium phosphide often suffers from rapid capacity fading due to particle pulverization from volume expansion and active lithium storage point decreasing ,. To solve these problems, three methods are presented: (1) to prepare MPs nanostructures.…”

Section: Introductionmentioning

confidence: 99%

“…Just like other MPs, indium phosphide often suffers from rapid capacity fading due to particle pulverization from volume expansion and active lithium storage point decreasing. [6,10] To solve these problems, three methods are presented: (1) to prepare MPs nanostructures. The nanoscale electrode materials not only increase the specific surface area of the material and the active site of lithium storage, but also play a role in buffering the volume effect.…”

Section: Introductionmentioning

confidence: 99%

Indium Phosphide/Reduced Graphene Oxide Composites as High‐Performance Anodes in Lithium‐Ion Batteries

Liu

Wei

2018

ChemElectroChem

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Indium phosphide/reduced graphene oxide (InP/rGO) composites were synthesized successfully through a facile one‐step route at 180 °C. The InP nanoparticles can be anchored uniformly on the surface of rGO nanosheets, forming a stable composite. Moreover, the size and dispersibility of InP nanoparticles can be greatly affected by the added rGO amount. The as‐prepared InP/rGO composites show better electrochemical performance than single‐component rGO nanosheets or InP nanoparticles. But, when the amount of rGO added is 5 mg, the electrochemical performance of InP/rGO composite is optimum. It delivers an initial discharge capacity of 1872 mAh g−1 and the reversible specific discharge capacity can remain at 689 mAh g−1 after 100 cycles at a current density of 100 mA g−1. Even at a current density of 500 mA g−1, the reversible specific capacity could still reach 500 mAh g−1. The enhanced electrochemical performances of as‐prepared composites might be attributed to the strong interaction between InP nanoparticles and rGO nanosheets.

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In Situ EXAFS‐Derived Mechanism of Highly Reversible Tin Phosphide/Graphite Composite Anode for Li‐Ion Batteries

Abstract: alloying reaction (Equation (2)) between metallic Sn and Li-ions as follows [1,2] Sn P 9Li 9e 4Sn 3Li P 4 3 3

Cited by 64 publications

References 36 publications

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries

Empowering Metal Phosphides Anode with Catalytic Attribute toward Superior Cyclability for Lithium‐Ion Storage

Indium Phosphide/Reduced Graphene Oxide Composites as High‐Performance Anodes in Lithium‐Ion Batteries

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In Situ EXAFS‐Derived Mechanism of Highly Reversible Tin Phosphide/Graphite Composite Anode for Li‐Ion Batteries

Abstract: alloying reaction (Equation (2)) between metallic Sn and Li-ions as follows [1,2] Sn P 9Li 9e 4Sn 3Li P 4 3 3

Cited by 64 publications

References 36 publications

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe2 for High Performance Li‐Ion Batteries

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe2 for High Performance Li‐Ion Batteries

Empowering Metal Phosphides Anode with Catalytic Attribute toward Superior Cyclability for Lithium‐Ion Storage

Indium Phosphide/Reduced Graphene Oxide Composites as High‐Performance Anodes in Lithium‐Ion Batteries

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Resources

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Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries

Healable Structure Triggered by Thermal/Electrochemical Force in Layered GeSe₂ for High Performance Li‐Ion Batteries