A Battery Made from a Single Material

Han, Fudong; Gao, Tao; Zhu, Yujie; Gaskell, Karen J.; Wang, Chunsheng

doi:10.1002/adma.201500180

Cited by 305 publications

(374 citation statements)

References 65 publications

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“…Moreover, one of the recent studies by Han et al . further motivated us to study on the interface between the solid electrolyte and the conductive carbon in ASSBs 31 . In their work, Han et al .…”

Section: Introductionmentioning

confidence: 99%

“…In their work, Han et al . utilized the oxidation and reduction of LGPS as an active electrode materials by preparing the composite cathode by mixing LGPS with a large amount of carbon black 31 . While the reversible electrochemical activity of LGPS in ASSBs is interesting and rather unexpected, it strongly implies that the inclusion of carbon additives seems to stimulate the electrochemical activity of LGPS when a sufficient amount of carbon surrounds the LGPS.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Yoon

Kim

Seong

et al. 2018

Sci Rep

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All-solid-state batteries are considered as one of the attractive alternatives to conventional lithium-ion batteries, due to their intrinsic safe properties benefiting from the use of non-flammable solid electrolytes in ASSBs. However, one of the issues in employing the solid-state electrolyte is the sluggish ion transport kinetics arising from the chemical and physical instability of the interfaces among solid components including electrode material, electrolyte and additive agents. In this work, we investigate the stability of the interface between carbon conductive agents and Li10GeP2S12 in a composite cathode and its effect on the electrochemical performance of ASSBs. It is found that the inclusion of various carbon conductive agents in composite cathode leads to inferior kinetic performance of the cathode despite expectedly enhanced electrical conductivity of the composite. We observe that the poor kinetic performance is attributed to a large interfacial impedance which is gradually developed upon the inclusions of the various carbon conductive agents regardless of their physical differences. The analysis through X-ray Photoelectron Spectroscopy suggests that the carbon additives in the composite cathode stimulate the electrochemical decomposition of LGPS electrolyte degrading its surface during cycling, indicating the large interfacial resistance stems from the undesirable decomposition of the electrolyte at the interface.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Yoon

Kim

Seong

et al. 2018

Sci Rep

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“…The ionic conductivity of LSiPSO was 3.2 × 10 −4 S cm −1 at room temperature. This value is one order of magnitude smaller than that of LGPS, which shows the ionic conductivity of 1.2 × 10 −2 S cm −1 for a sintered pellet (Kamaya et al, 2011) or 6-8 × 10 −3 S cm −1 for a cold-pressed pellet (Kato et al, 2012;Shin et al, 2014;Han et al, 2015). Nevertheless, the ionic conductivity value of LSiPSO meets the conductivity criterion (>10 −4 S cm −1 ) proposed for practical electrolytes in lithium batteries (Goodenough and Kim, 2010).…”

Section: Ionic Conductivitymentioning

confidence: 71%

“…In addition, the shapes of the CV curves at 3-5 V did not change significantly over five cycles, indicating electrochemical stability with respect to oxidation when in contact with cathode materials having a high electrochemical potential (4-5 V vs. Li/Li + ). This experimentally observable stability toward oxidation is considered due to formation of a passivation layer between a solid electrolyte and electrode (Han et al, 2015;Richards et al, 2016). Cathodic and anodic currents were observed near 0 V (vs. Li + /Li), these were partly owing to the lithium deposition reaction (Li + + e − → Li) and the dissolution reaction (Li → Li + + e − ), respectively.…”

Section: Electrochemical Stabilitymentioning

confidence: 99%

Lithium Superionic Conductor Li9.42Si1.02P2.1S9.96O2.04 with Li10GeP2S12-Type Structure in the Li2S–P2S5–SiO2 Pseudoternary System: Synthesis, Electrochemical Properties, and Structure–Composition Relationships

et al. 2016

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“…In previous studies, the solid electrolyte powders were often added into the cathode to act as Li ionic conductor, but it forms a discontinuous Li + conducting network. 13,15,16 The construction of Li + conductive network with three-dimensional (3D) structures in the cathode is expected to be a powerful alternative to achieve high active material utilization rate.Ionically conducting polymer electrolytes are commonly complexes of a lithium salt (LiX) with a high molecular weight polymer such as polyethylene oxide (PEO) which has a room temperature (RT) Li ionic conductivity of 10 • C and the long chain structure is expected to constitute a highly conductive 3D continuous ionic network in cathode. Simultaneously, the high ) unless CC License in place (see abstract).…”

mentioning

confidence: 99%

High Capacity All-Solid-State Lithium Battery Using Cathodes with Three-Dimensional Li⁺Conductive Network

Zhang

Chen

Yang

et al. 2017

J. Electrochem. Soc.

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All-solid-state lithium batteries (ASLBs) have been dramatically attracted recently for its ability of solving the safety issues in traditional lithium ion batteries using liquid electrolyte. However the poor Li + transportation between the active material particles in the cathode greatly deteriorate the specific capacity of ASLBs. Herein, we design a composite cathode composed of polyethylene oxide (PEO) and LiCoO 2 (LCO) in which a three-dimensional (3D) continuous Li + conductive network forms. With the decrease of the LCO: PEO ratio, the 3D Li + conductive network gradually becomes continuous, and the corresponding discharge capacity increase from 50 to 136 mAh g −1 . At LCO: PEO = 6:1 and 4:1, the corresponding ASLBs has a very high discharge capacity of 136 and 124 mAh g −1 , respectively, representing approximately 98% and 90% of the theoretical discharge capacity. The capacity retention after 5 cycles is 97%∼98% of the 2 nd cycle, which confirms stable cycle performance of the battery. The FTIR results show that, in the composite cathode, the LCO particles transport Li + cations by coordinating CO functional group in PEO chains. Compared with other optimized ASLBs based on LLZO solid elctrolyte, our battery has higher specific capacity while being tested under the highest current rate. Recently, the all-solid-state lithium batteries (ASLBs) based on solid electrolyte are receiving significant attention for its safety by the displacement of the volatile and flammable liquid electrolyte.1-4 To develop high performance ASLBs, three critical issues must be considered: (1) get a high lithium ionic conductivity solid electrolyte of 10 −2 ∼10 −3 S cm −1 at room temperature and stability against chemical reaction with lithium anode, (2) lower the interfacial resistance between the electrodes and solid electrolyte, (3) solve the problem of poor Li ionic transportation among active material particles in the cathode. However, the third issue is often overlooked.The garnet-type inorganic oxide lithium ion conductor, nominal Li 7 La 3 Zr 2 O 12 (LLZO), is highly expected to be used as the solid electrolyte to accelerate the development of ASLBs.5-8 Recent reports reveal that doping with elements such as Ga 3+ and Ta 5+ can improve its room temperature conductivity to 0.4∼1.0 × 10 −3 S cm −1 . 9,10The LLZO system is reported to be stable with Li metal anode as well as possessing high electrochemical window (vs Li > 5 v). 11 The wide electrochemical window allows the use of high voltage cathode materials which may result in a potential high specific capacity for ASLBs.So far, the interfacial resistance between the electrodes and solid electrolyte has become the main contributor to the internal resistance of ASLBs, especially the resistance between cathode and solid electrolyte. Electrochemical performance of ASLBs based on LLZO solid electrolyte has been constructed by some groups using various methods aimed at reducing the interfacial resistance.12-15 Tan et al.12 reported a proto-type Li/LLZO/LiCoO 2 (LCO) cell whic...

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A Battery Made from a Single Material

Cited by 305 publications

References 65 publications

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Lithium Superionic Conductor Li9.42Si1.02P2.1S9.96O2.04 with Li10GeP2S12-Type Structure in the Li2S–P2S5–SiO2 Pseudoternary System: Synthesis, Electrochemical Properties, and Structure–Composition Relationships

High Capacity All-Solid-State Lithium Battery Using Cathodes with Three-Dimensional Li⁺Conductive Network

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A Battery Made from a Single Material

Cited by 305 publications

References 65 publications

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Lithium Superionic Conductor Li9.42Si1.02P2.1S9.96O2.04 with Li10GeP2S12-Type Structure in the Li2S–P2S5–SiO2 Pseudoternary System: Synthesis, Electrochemical Properties, and Structure–Composition Relationships

High Capacity All-Solid-State Lithium Battery Using Cathodes with Three-Dimensional Li+Conductive Network

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High Capacity All-Solid-State Lithium Battery Using Cathodes with Three-Dimensional Li⁺Conductive Network