Encapsulation of Se/C into ultra-thin Ni(OH)2 nanosheets as cathode materials for lithium-selenium batteries

Luo, Rongjie; Lu, Yang; Hou, Xiaoyi; Yu, Qiuhong; Peng, Tao; Yan, Hailong; Liu, Xianming; Kim, Jang Kyo; Luo, Yongsong

doi:10.1007/s10008-017-3696-y

Cited by 14 publications

(10 citation statements)

References 38 publications

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“…The high-resolution XPS spectrum of C 1s in Figure c can be divided into three individual peaks, successively attributing to the CC (284.4 eV), C-O (286.2 eV), and CO (288.5 eV). ,, The Ni 2p XPS spectrum (Figure d) shows two conspicuous peaks (indexed to Ni 2p 3/2 and Ni 2p 1/2 ) lying at BEs of 855.7 and 873.4 eV, and a pair of satellite ( Sat. ) peaks at high BEs of ∼861.2 and ∼879.3 eV, respectively. ,, This testing result reveals the involved Ni element is in a chemical state of Ni II , highly consistent with that of NNH shells. , The Raman spectroscopy (Figure e) illustrates there is a visible peak centered at the position of ∼460 cm –1 , corresponding to the fingerprint vibration model of Se and S (the Raman signal for pure Se and S: ∼451 and ∼462 cm –1 ). , The other two peaks at ∼1340 and ∼1577 cm –1 mainly stem from the D and G bands of CB. , Thermogravimetric analysis (TGA) is conducted to determine the content of Se and S in hybrid products. Note that, prior to the thermal measurement, the powder samples are subjected to an acid wash treatment to totally remove NNH films.…”

Section: Results and Discussionsupporting

confidence: 52%

“…X-ray photoelectron spectroscopy (XPS) measurement is also performed to study the chemical bonding within S/Se@CB⊂NNH products. In the Se 3d spectrum (Figure a), two prominent peaks are located at ∼55.2 and ∼55.9 eV, which are ascribed to Se 3d 5/2 and Se 3d 3/2 , respectively. , The S 2p spectrum of S/Se@CB⊂NNH (Figure b) can be fitted into three independent peaks. The dual peaks emerged at a binding energy (BE) of ∼162.3 and ∼163.7 eV are highly associated with S 2p 3/2 and S 2p 1/2 . , Notably, both S 2p peak positions slightly shift to the lower direction (BE peaks for pure S: ∼163.8 and ∼165.1 eV).…”

Section: Results and Discussionmentioning

confidence: 96%

“…In the Se 3d spectrum (Figure 4a), two prominent peaks are located at ∼55.2 and ∼55.9 eV, which are ascribed to Se 3d 5/2 and Se 3d 3/2 , respectively. 25,26 The S 2p spectrum of S/Se@CB⊂NNH (Figure 4b) can be fitted into three independent peaks. The dual peaks emerged at a binding energy (BE) of ∼162.3 and ∼163.7 eV are highly associated with S 2p 3/2 and S 2p 1/2 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Smart Merit Combination of Sulfur, Selenium and Electrode Engineering To Build Better Sustainable Li-Storage Batteries

Meng

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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Given the giant theoretical capacity and great natural abundance of sulfur (S), Li-S batteries have been regarded as one of the most promising sustainable power sources in the future. However, they have to suffer from issues of short cyclic lifespan, low Coulombic efficiency, and poor rate behaviors unfortunately due to the insulating nature for S actives and negative polysulfide intermediates dissolution. As a congener, the conducting selenium (Se) shows the similar Li-storage chemistry to S, with comparable volumetric capacity, superb rate capability, but unluckily low gravimetric capacity and limited cyclic life. To build sustained power systems with preferable behaviors, we put forward an efficient battery promotion strategy by combining merits of S, Se and smart electrode engineering. Herein, Se and S are successively infused into a carbon black (CB) matrix and further packaged by thin nickel nitrate hydroxide layers (S/Se@CB⊂NNH) so as to suppress the actives diffusion losses. Such integrated S/Se@CB⊂NNH hybrids well inherit the superiorities of S, Se and benefit from the integrated electrode design, capable of showing high reversible specific capacities (∼913 mAh g–1), excellent rate capability and cyclic stability (almost 100% Coulombic efficiency), and greatly prolonged lifetime. Our present work may provide an efficient, scalable, and applicable way to develop reliable and superior cathodes for sustainable Li-storage applications.

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Section: Results and Discussionsupporting

confidence: 52%

Section: Results and Discussionmentioning

confidence: 96%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Smart Merit Combination of Sulfur, Selenium and Electrode Engineering To Build Better Sustainable Li-Storage Batteries

Meng

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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“…For instance, Luo et al. [ 144 ] synthesized a Se/C composite embedded in Ni(OH) 2 nanosheets via solution‐based process, which showed a long lifespan for 300 cycles at 1 C. Subsequently, Sun et al. [ 145 ] reported AgSe 2 coated Se/C composite, where AgSe 2 was found to be selenophilic and therefore helpful for immobilizing Se species.…”

Section: Cathodesmentioning

confidence: 99%

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Sun

Liu

et al. 2021

Advanced Materials

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Li‐chalcogen batteries, especially the Li–S batteries (LSBs), have received paramount interests as next generation energy storage techniques because of their high theoretical energy densities. However, the associated challenges need to be overcome prior to their commercialization. Elemental selenium, another chalcogen member, would be an attractive alternative to sulfur owing to its higher electronic conductivity, comparable capacity density, and moreover, excellent compatibility with carbonate electrolytes. Unlike LSBs, the research and development of Li–Se batteries (LSeBs) have garnered burgeoning attention but are still in their infant stage, where a comprehensive yet in‐depth overview is highly imperative to guide future research. Herein, a critical review of LSeBs, in terms of the underlying mechanisms, cathode design, blocking layer engineering, and emerging solid‐state electrolytes is provided. First, the electrolyte‐dependent electrochemistry of LSeBs is discussed. Second, the advances in Se‐based cathodes are comprehensively summarized, especially highlighting the state‐of‐the‐art SexSy cathodes, and mainly focusing on their structures, compositions, and synthetic strategies. Third, the versatile separators/interlayers optimization and interface regulation are outlined, with a particular focus on the emerging solid‐state electrolytes for advanced LSeBs. Last, the remaining challenges and research orientations in this booming field are proposed, which are expected to motivate more insightful works.

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“…Lithium-ion batteries (LIBs) have been widely used in portable electronic devices and electric vehicles because of the advantages of high-efficiency energy conversion, long cycling life, high energy density, and low self-discharge [1–3]. However, new generation LIBs with higher energy density, higher rate capability, and higher cycling performance are urgently needed to meet the development of electric vehicles [4–6].…”

Section: Introductionmentioning

confidence: 99%

The Core-Shell Heterostructure CNT@Li2FeSiO4@C as a Highly Stable Cathode Material for Lithium-Ion Batteries

et al. 2019

Self Cite

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The reasonable design of nanostructure is the key to solving the inherent defects and realizing a high performance of Li2FeSiO4 cathode materials. In this work, a novel heterostructure CNT@Li2FeSiO4@C has been designed and synthesized and used as a cathode material for lithium-ion battery. It is revealed that the product has a uniform core-shell structure, and the thickness of the Li2FeSiO4 layer and the outer carbon layer is about 19 nm and 2 nm, respectively. The rational design effectively accelerates the diffusion of lithium ions, improves the electric conductivity, and relieves the volume change during the charging/discharging process. With the advantages of its specific structure, CNT@Li2FeSiO4@C has successfully overcome the inherent shortcomings of Li2FeSiO4 and shown good reversible capacity and cycle properties.

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Encapsulation of Se/C into ultra-thin Ni(OH)2 nanosheets as cathode materials for lithium-selenium batteries

Cited by 14 publications

References 38 publications

Smart Merit Combination of Sulfur, Selenium and Electrode Engineering To Build Better Sustainable Li-Storage Batteries

Smart Merit Combination of Sulfur, Selenium and Electrode Engineering To Build Better Sustainable Li-Storage Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

The Core-Shell Heterostructure CNT@Li2FeSiO4@C as a Highly Stable Cathode Material for Lithium-Ion Batteries

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