Scholarlink

<p>The development of high-voltage LiNiO<sub>2</sub> is critical for achieving high-energy-density all-solid-state Lithium-ion batteries. However, their practical application is hindered by structural fatigue and interfacial incompatibility with solid electrolytes. Here, a universal heterophase reconstruction strategy is proposed to engineer a stable LiNiO<sub>2</sub>-based positive electrode (LiNi<sub>0.964</sub>Al<sub>0.03</sub>W<sub>0.006</sub>O<sub>2</sub>). In this architecture, high-valence W facilitates the formation of a robust surface spinel phase that exhibits good interfacial compatibility with sulfide electrolytes, while low-valence Al suppresses Li/Ni cation disorder through strong Al–O bonding, stabilizing the layered structure. The synergy of W and Al reinforces a stable layered-spinel framework with enhanced mechanical and chemical integrity, mitigates lattice strain and suppresses the detrimental rock-salt phase and microcracks. Operating up to 4.5 V, LiNi<sub>0.964</sub>Al<sub>0.03</sub>W<sub>0.006</sub>O<sub>2</sub> delivers a high capacity of 187.6 mAh g<sup>-1</sup> at 0.5 C and maintains 122.1 mAh g<sup>-1</sup> even after 720 cycles. This heterophase reconstruction strategy concept is further validated in LiNiO<sub>2</sub>-based systems (LiNi<sub>0.964</sub>Al<sub>0.03</sub>Mo<sub>0.006</sub>O<sub>2</sub>, LiNi<sub>0.964</sub>B<sub>0.03</sub>W<sub>0.006</sub>O<sub>2</sub>, and LiNi<sub>0.964</sub>B<sub>0.03</sub>Nb<sub>0.006</sub>O<sub>2</sub>), confirming a general, scalable design rule for advancing cobalt-free, high-energy and long-life all-solid-state Lithium-ion batteries.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

High-voltage and stable co-free LiNiO2 positive electrode for sulfide-based all-solid-state batteries

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月8日

查看全文
  • Yue Wang,
  • Dixing Ni,
  • Huan Li,
  • Bernt Johannessen,
  • Chao Ye,
  • Shi-Zhang Qiao

摘要

The development of high-voltage LiNiO2 is critical for achieving high-energy-density all-solid-state Lithium-ion batteries. However, their practical application is hindered by structural fatigue and interfacial incompatibility with solid electrolytes. Here, a universal heterophase reconstruction strategy is proposed to engineer a stable LiNiO2-based positive electrode (LiNi0.964Al0.03W0.006O2). In this architecture, high-valence W facilitates the formation of a robust surface spinel phase that exhibits good interfacial compatibility with sulfide electrolytes, while low-valence Al suppresses Li/Ni cation disorder through strong Al–O bonding, stabilizing the layered structure. The synergy of W and Al reinforces a stable layered-spinel framework with enhanced mechanical and chemical integrity, mitigates lattice strain and suppresses the detrimental rock-salt phase and microcracks. Operating up to 4.5 V, LiNi0.964Al0.03W0.006O2 delivers a high capacity of 187.6 mAh g-1 at 0.5 C and maintains 122.1 mAh g-1 even after 720 cycles. This heterophase reconstruction strategy concept is further validated in LiNiO2-based systems (LiNi0.964Al0.03Mo0.006O2, LiNi0.964B0.03W0.006O2, and LiNi0.964B0.03Nb0.006O2), confirming a general, scalable design rule for advancing cobalt-free, high-energy and long-life all-solid-state Lithium-ion batteries.